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(I came across the following write-up on a discussion thread in one of the testing forums and am posting it here. Unfortunately, I forgot the name of the original contributor of the following piece)

 

The primary difference:Efficiency - productivity metric and Effectiveness - quality metric!

 

Efficiency is a productivity metrics meaning how fast one can do something. Hence Testing efficiency metric can be "No. of test cases executed per hour or per person day". This explains how efficient (i.e. fast) the person is at testing.

 

Effectiveness is a quality metrics meaning how good a person is at testing. Hence Testing effectiveness metrics can be "No. of bugs identified by a tester in a given feature / Total no. of bugs identified in that feature". Here the difference between total bugs and bugs identified by the tester could be that some bugs must have been uncovered by the customer since the tester was not able to detect them during testing.

 

If bugs uncovered by a tester and total no. of bugs are same, meaning that all the defects were uncovered by the tester, then he is 100 % effective in testing the product. Posted on Wednesday, June 9, 2004 7:38 AM Software Testing | Back to top


Comments on this post: Efficiency Vs Effectiveness

# re: Efficiency Vs Effectiveness
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Efficiency.....Do the things right

Effectiveness......Do the right things
Left by Mr.Sitthinath Sanpanich on Jul 24, 2004 4:00 PM

# re: Efficiency Vs Effectiveness
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Effectiveness means being able to achieve a set goal while

Efficiency is achieving the goals with minimum resources.
Left by Kunle Oyetayo on Oct 25, 2005 5:26 PM

# re: Efficiency Vs Effectiveness
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Effectiveness= System Size/No of defects found by testing

Efficiency= No of test cases executed/Total number test cases
Left by Manjula on Apr 24, 2006 8:11 AM

# re: Efficiency Vs Effectiveness
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Effectiveness= System Size/No of defects found by testing

Efficiency= No of test cases executed/Total number test cases
Left by Manjula on Apr 24, 2006 8:11 AM

# re: Efficiency Vs Effectiveness
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Effectiveness= System Size/No of defects found by testing

Efficiency= No of test cases executed/Total number test cases
Left by Manjula on Apr 24, 2006 8:12 AM

# re: Efficiency Vs Effectiveness
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Effectiveness is Happiness
Effeciency is Pleasure
Left by Sudhaker on Jun 24, 2006 2:16 PM

# re: Efficiency Vs Effectiveness
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Efficiency must come with mentality;
Effectiveness must come with planning.
Left by Evy on Aug 03, 2006 9:12 AM

# re: Efficiency Vs Effectiveness
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Efficiency concerns about the 'means'
Effectiveness concerns about the 'ends'
Left by Cheryl on Aug 17, 2006 5:50 AM

# re: Efficiency Vs Effectiveness
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When I was with IBM, I remember I came across a definition which attributed efficiency to systems and processes and effectiveness to people. However, I also quote from engineering background a definition of efficiency as the output/input ratio.

Effectiveness seems to be related to achieving results (desired effects) regardless of how efficient or inefficient the involved system(s)/process(es) is or are

Left by Mohammed Thiab on Nov 14, 2006 9:38 PM

# re: Efficiency Vs Effectiveness
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1. Efficiency is focussed on Process, Effectiveness on Output

2. Efficiency seeks conformance to norm (and aims to reduce varaiance); Effectivess aims to raise the performance level (and aims to change status Quo through a step change)
Left by S.P.Singh on Jul 02, 2007 6:02 AM

# re: Efficiency Vs Effectiveness
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Effeciency is to save money, time & efforts regardless qulity
Effectiveness is how well the job gets done , focus on quality

Left by Randa Ibrahim, Egypt on Jul 21, 2007 6:03 AM

# re: Efficiency Vs Effectiveness
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Nice defination and usefull for all the people involve in such jargan in Devlopment sector.
Left by Nabasis Das on Aug 10, 2007 3:23 AM

# re: Efficiency Vs Effectiveness
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Effectiveness is a measure of completeness of a product / service
Efficiency is a a measure of correctness of a product / service..

I extend my thanks for the people already posted here..it is useful for my presentation... thank you
Left by Suresh Kumar on Aug 28, 2007 2:37 AM

# re: Efficiency Vs Effectiveness
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sir ,
I want clarifiction on difference between efficency and effictiveness.
Left by rajiv ratna panda on Aug 29, 2007 11:27 PM

# re: Efficiency Vs Effectiveness
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- Efficiency is concerned with the relationship between planned processes and actual processes; and
- Effectiveness is concerned with the relationship between planned outputs and actual outputs.
Left by David Gachoka on Sep 26, 2007 6:38 AM

# re: Efficiency Vs Effectiveness
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Which is important in an organization effectiveness or efficiency.
Left by bhdscb on Oct 31, 2007 1:37 AM

# re: Efficiency Vs Effectiveness
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Which is important in an organization efficiency or effectiveness.
Left by nmsx on Oct 31, 2007 1:39 AM

# re: Efficiency Vs Effectiveness
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Organization uses the efficiency ore effectiveness.
Left by sdd on Oct 31, 2007 1:46 AM

# re: Efficiency Vs Effectiveness
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Efficiency and effectiveness despite its differences are interrelated. This is because while efficiency is looking at how a work is done. Effectiveness on the other hand looks into what is being done.Even though efficiency is regardless of quality, if the best efficient means is used, it turns out that quality products are achieved.
Left by Stephanie Ampofowaa Adu on Nov 01, 2007 11:16 AM

# re: Efficiency Vs Effectiveness
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Efficiency means Input /Output

Effectiveness : Input /Output * Tme

Left by K.KARTHIC on Nov 13, 2007 5:04 AM

# re: Efficiency Vs Effectiveness
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For an organisation both efficiency and effectiveness are important. an organisation has set of objectives which it has to fulfill within the available resources. how far it is able to acheive its goals/objectives with minimum utilisation of resources determines its effectiveness and efficiency levels respectively...
Left by Rohini Shinde on Jan 29, 2008 2:08 AM

# re: Efficiency Vs Effectiveness
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Effectiveness is more important.
Left by Luna on Feb 10, 2008 2:20 AM

# re: Efficiency Vs Effectiveness
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Efficiency means smile: effectiveness means happiness
Left by Nemat on Feb 15, 2008 10:28 AM

# re: Efficiency Vs Effectiveness
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can you explain the factors which contribute to instructor's sense of effeciency and effectiveness? thanks
Left by Jacky esternon on Apr 15, 2008 9:52 AM

# re: Efficiency Vs Effectiveness
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Efficiency means save time , money and effort

Effectiveness means..to get the best quality product
Left by Naqqash Merchant on May 03, 2008 11:13 AM

# re: Efficiency Vs Effectiveness
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Effectiveness means to accomplish a task according to its requirements with successful expected results.

Efficiency is to accomplish this task in best possible way.

Left by ashfaq on May 08, 2008 6:57 AM

# re: Efficiency Vs Effectiveness
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what is the difference between effectiveness and efficiency.
Left by margaret on May 14, 2008 8:22 AM

# re: Efficiency Vs Effectiveness
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the above write up is very clearly explained. it is short and conscise which add up to pleasure of reading. all the definations are clearly seperated which results increase visibility.
the addition of colour would have been brougt more distinction between various definitions.
Left by ABHISHEK KUMAR on May 26, 2008 2:31 AM

# re: Efficiency Vs Effectiveness
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Effectiveness;is to do somthing well while Efficiency is to do something with a least possible means.
Left by sheriff osman(outlaw) on May 27, 2008 6:19 PM

# re: Efficiency Vs Effectiveness
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Efficiency is a productivity metrics meaning how fast one can do something. Hence Testing efficiency metric can be "No. of test cases executed per hour or per person day". This explains how efficient (i.e. fast) the person is at testing.



Effectiveness is a quality metrics meaning how good a person is at testing. Hence Testing effectiveness metrics can be "No. of bugs identified by a tester in a given feature / Total no. of bugs identified in that feature". Here the difference between total bugs and bugs identified by the tester could be that some bugs must have been uncovered by the customer since the tester was not able to detect them during testing.
Left by Saeed Ahmad on Jul 08, 2008 3:35 AM

# re: Efficiency Vs Effectiveness
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Efficiency = output (number of customer service calls taken per hour)

Effectiveness = outcome (customers who are satisfied with the answers received)
Left by MGP on Jul 24, 2008 1:35 AM

# re: Efficiency Vs Effectiveness
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i want to know the difference between efficiency and effectiveness
Left by krunal panchal on Sep 01, 2008 7:26 AM

# re: Efficiency Vs Effectiveness
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Effectiveness has to do with the achievement of objective but how the objective will be achieved is efficiency.
In effect effectiveness is achieving results but efficiency is using fewer resources to achieve the said results.

Example;
Sally and Sandra have been given 20units to produce the same output of 40units.
They both produced 40units of output but Sally used 12units of inputs whiles Sandra used all the 20units of inputs.

Here Sally and Sandra have all been effective since they have all achieved the required results of 40units of output.
But how the outputs were achieved is the question of efficiency. Sally used only 12units of output to achieve the 40units required output whiles Sandra used all the 20units of inputs to achieve the required 40units of outputs.

So we say Sally has been efficient (effective and efficient)
Sandra has not been efficient but effective.
Left by Boakye-Yam Boadi on Oct 08, 2008 11:13 AM

# re: Efficiency Vs Effectiveness
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effectiveness -concerned about the ends
efficiency-concerned about the means
Left by nitish joshi (bim-m)mba student on Oct 12, 2008 8:48 AM

# re: Efficiency Vs Effectiveness
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Efficiency- Input / Output on a time window. (No of test cases executed versus no of test cases planned to be executed). Right skills is one of the factors for efficiency.

Effectiveness- Focus areas that brought about the end result. Good Quality process ensures effectiveness.
Left by Nagesh on Oct 13, 2008 3:36 AM

# re: Efficiency Vs Effectiveness
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Effectiveness - Doing the Right Thing
Efficiency - Doing the Things in Right Way
Left by Suresh Kumar Reddy B on Oct 14, 2008 10:08 AM

# re: Efficiency Vs Effectiveness
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I extend my thanks for the people already posted here..it is useful for my presentation... thank you
Left by karan doshi on Oct 18, 2008 11:40 PM

# re: Efficiency Vs Effectiveness
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the really awesome posts on the topic.....
i wd say there is a thin line of difference between the efficiency and effectiveness but only when the efficiency has been worked upon. To bring out the effective method, one really has to work very hard on its efficiency. so at the organization level efficiency takes the higher priority.
Left by Chetna Angrish on Jan 01, 2009 3:13 AM

# re: Efficiency Vs Effectiveness
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The leader must discover that "Doing things right is not as important as doing the right thngs."
Left by Hamid on Jan 08, 2009 1:23 AM

# re: Efficiency Vs Effectiveness
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eating soup with a fork is not efficient but effective. the job is done the hard way. eating the same soup with the spoon that you left in the drawer is efficency. it gets the same job done the easier way.
Left by Moyoli on Feb 22, 2009 7:51 AM

# re: Efficiency Vs Effectiveness
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good article
Left by bsrao on Mar 28, 2009 6:34 PM

# re: Efficiency Vs Effectiveness
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effeciency : do the job ordinary
effectiveness: do the job extra ordinary
Left by saravana velu on Mar 30, 2009 3:11 AM

# re: Efficiency Vs Effectiveness
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Please email me this
Left by Pamella on Apr 13, 2009 11:57 PM

# re: Efficiency Vs Effectiveness
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Don't concentrate too much on the distinctions between the two words however. What's important is to determine what your own needs (or your company's needs) are, create categories for them, work to accomplish them, and then set up systems to measure your progress.

It's true that effectiveness and efficiency should be measured in this process, but we believe there are other, equally important things that need to be valued and, therefore, evaluated. They are:

* High levels of integrity;
* Legendary service for customers;
* Empowered employees; and
* Organization Productivity (efficiency).

So, to answer your question, efficiency and effectiveness are both important, but they're just two of the things on which you should be focusing.
Left by engagement rings on Apr 27, 2009 5:02 PM

# re: Efficiency Vs Effectiveness
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Efficiency and effectiveness are inter-related, however, efficiency is doing something well at a very minimal time without, that is being capable of doing something very skilfully without mistakes.

Effectiveness on the other hand, is producing the desired results in a particular thing.
Left by Inny U on May 04, 2009 9:12 AM

# re: Efficiency Vs Effectiveness
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Simple really:

Efficiency - Doing things right.
Effectiveness - Doing the right thing.

Left by Satish Patel on Jun 10, 2009 8:15 AM

# re: Efficiency Vs Effectiveness
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Efficiency is the amount performed and efficiency is how much the objective is achieved.
Left by Hamade on Jul 17, 2009 12:23 AM

# re: Efficiency Vs Effectiveness
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tnx alot for these gr8 information
Left by kazim on Jul 17, 2009 12:31 PM

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effective & efficiency
Left by kamran on Jul 27, 2009 4:24 AM

# re: Efficiency Vs Effectiveness
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Effectiveness ->WAY that produces the intended result or successful result.
Effectiveness->the quality of doing something well with no waste of time or money.
Left by munkmink on Jul 31, 2009 1:46 PM

# re: Efficiency Vs Effectiveness
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Efficiency = Output / Input (Resources)
Effectiveness = Output / Target
What is better? Answer: We can not answer.
Because Efficiency point to reducing resources (Time/Man/Machine/Material/Money/etc..)
Effectiveness point to reach target.
The best way. We need both of them.
Left by JameJune on Aug 22, 2009 6:56 AM

# re: Efficiency Vs Effectiveness
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efficiency means the more attention is on output quantity, to be produced in less resourses

effectiveness means that the more attention is on output quality, to satisfy the consumers need
Left by SHARFUL KHAN on Sep 08, 2009 2:33 PM

# re: Efficiency Vs Effectiveness
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In a industry both efficiency and effectiveness is requied but in combined manner, because when efficiency process will be done the effectiveness will be in mind. it will result in more productivity in less resourses with better quality for competitive advantage and for consumer satisfaction.
Left by SHARFUL KHAN(dilkap res &mgt sd on Sep 08, 2009 2:46 PM

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Efficiency - Within a given constraints, how best you can achieve your results in terms of its completeness and correctness.

Effectiveness - Achieving the best results but without having constraints. For example - if someone asked to do the a particular task, and provided him all the resources he needs and then judging him/her that how best are the results - defines the effectiveness of a person.
Left by Rajnish Saxena on Sep 24, 2009 10:05 AM

# re: Efficiency Vs Effectiveness
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Efficiency: more care about quality such as:time, money,effort
Effectiveness: more care about quality of product
generally, Effectivness is more important, but a company needs both of them to be more successful
Left by A.Maddahi on Sep 25, 2009 3:33 PM

# re: Efficiency Vs Effectiveness
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productivity is indicator of efficiency and profitability is indicator of effecftiveness
Left by farah on Oct 17, 2009 4:42 AM

# re: Efficiency Vs Effectiveness
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what is the difference between the effiency and effectiveness with excellent examples.
Left by rajasekharam on Nov 01, 2009 1:52 AM

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Insractor At sun saharan countries
Left by Gebrekidan on Nov 03, 2009 1:03 AM

# re: Efficiency Vs Effectiveness
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these information are very useful to me.because all will be clearly indicated in this page.so that will helping me to understand the concept clearly
Left by buvaneshwari.k on Nov 06, 2009 12:47 AM

# Efficiency Vs Effectiveness
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efficiency means doing things right in order to achieve company's goals while effectiveness means doing the right things where the actual ouput meet the planned .
Left by Eng.Sufian Jamous on Nov 08, 2009 4:12 AM

# re: Efficiency Vs Effectiveness
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effectiveness X efficiency = productivity

doing the right things right at the right moment with the right people = SUCCESS
Left by Erkan DEREBEK on Nov 20, 2009 4:05 AM

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effectiveness refers to management’s use of organization resources in meeting organizational goals. If organizations are using their resources to attain their goals, the managers are said to be effective. In reality, however there are degrees of managerial effectiveness. The close an organization comes to achieving its goal, the more effective its managers are considered to be. Managerial effectiveness, then, exists on a continuum ranging from ineffective to effective.

efficiency is the proportion of total organizational resources that contribute to productivity during the manufacturing process. The higher this proportion the more efficient the manager. The more resources wasted or unused during the production process, the efficient manager. The situation, organizational resources refers not only to raw materials that are used in manufacturing goods or services but also related human effort.
Left by Lutfi Sheriff Mohamed on Nov 24, 2009 4:20 AM

# re: Efficiency Vs Effectiveness
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Thnks a lot for the definitions you presented here,

- Effective is a doing the task, which is doing the things.
- efficiency is a way or how you are doing the task, which is Doing the right things.
Left by A A Ainanshe on Dec 04, 2009 3:50 PM

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effeciency + Effective = excellent!
Left by shiny on Dec 08, 2009 12:11 PM

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Efficiency measures how many hours the 1 kW motor is run per day, e.g. 3h/8h.

Effect tells that the motor's power is 1 kW.

Effectiveness tells that with a full load the motor can be run say 100 h, but with 0.8 kW however long ...
Left by Jupper on Jan 04, 2010 10:59 AM

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Defining Effectiveness

Being effective means producing powerful effects. Being efficient means producing results with little wasted effort. It is the ability to carry out actions quickly. However, by so doing, you may not be achieving effectiveness. Effectiveness involves achieving your worthwhile goals that support your vision and mission.

For instance, you may be very efficient at working through and completing your to-do list. However, when you shift your focus to being effective, you may choose to delegate part of your list, stop doing some of it, and focus on one or two things that enable you to achieve your goals. Perhaps you're efficient at sending follow up letters to potential clients, but being effective may mean only following up more comprehensively on certain key ones.
Where does your time go?

When your intention shifts to being more effective, you can achieve your worthwhile goals in much less time. You choose the things that improve your effectiveness instead of doing more and more to achieve a sense of efficiency.

Effectiveness comes from taking the time to stop and evaluate, rather than running faster and faster. Discovering for yourself what effectiveness means, and what it will take for you to achieve this, is one of the objectives of coaches when working with individuals or organizations. When I'm working with clients, we often focus on their effectiveness. Our weekly telephone coaching session provides the opportunity to stop, look at where they are and where they want to be.

I believe that effectiveness is enhanced when you take time to re-evaluate. I'm also a great believer in taking this time at regular intervals during your day. So many people set out to work harder and harder, without really looking to see if they're being effective. I've found that what works best for me is to work for 15 minutes slots with breaks of a few minutes in between.

I strongly believe that if more people worked this way, companies would be much stronger and more effective. For instance, lets say you're working on a proposal. You work on it for 15 minutes and then put it aside for the next few minutes. You can use this break to stretch your legs, step outside for fresh air, enjoy a period of quiet reflection, or clear thoughts from your mind. You choose what would be most beneficial.

When you return to your proposal for the next 15 minutes, you'll probably find that something occurs to you which you had forgotten, or you didn't see as being important. You may find you now have a different perspective on it or you now have a solution to something you were stuck on. It's increased your effectiveness. When you only have 15 minutes, you'll work more effectively to achieve more within this artificial deadline.

Work smarter, not harder. You'll become far more effective in achieving your goals and vision.
Left by celtic rings on Jan 11, 2010 3:34 AM

# re: Efficiency Vs Effectiveness
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achieve goals effectiveness and efficient
Left by adjei michael on Jan 25, 2010 1:01 PM

# re: Efficiency Vs Effectiveness
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The various kind of the defnitions given by the various kind of background peoples only make us confusing, try to get a professional person from the academician person for the correct definition. TQ
Left by SURESH TAHUNSON on Jan 29, 2010 1:29 AM

# re: Efficiency Vs Effectiveness
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efficiency generates more profits, while effectiveness generates less cost.
Left by Dinu on Feb 28, 2010 3:27 AM

# re: Efficiency Vs Effectiveness
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I will be very simple and everyone understands the difference:

Efficiency quantity or speed.
Effectiveness refers to the quality.

João live in City Suzano Estate São Paulo-SP / Brasil
Left by Joao Chagas on Mar 03, 2010 10:03 PM

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efficiency vs effectiveness
Left by sekhar on Mar 28, 2010 5:08 AM

# re: Efficiency Vs Effectiveness
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efficiency is obTaining the maximum level of output(in terms of services produced or delivered) from a given level of inputs,or alternatively the use of minimum input for a given output....i.e DO THINGS RIGHT...while effectiveness is concerned with achieveing the goals of the organisation or operation....i.e DO THE RIGHT THING..
Left by samuel mitchell on Apr 04, 2010 8:38 PM

# re: Efficiency Vs Effectiveness
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efficiency- how well it is being done
effectiveness- how well it is done
Left by Sharon on Apr 10, 2010 3:37 AM

# re: Efficiency Vs Effectiveness
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Efficiency is setting a goal and attaining it by maximising resources, effectiveness is setting a goal and attaining it.
Left by Iyiade adedamola on Apr 29, 2010 8:25 AM

# re: Efficiency Vs Effectiveness
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this is one of the best article on effectiveness vs efficiency. if people read this article , they will never forget in thier life about the diffence of above said subject.
Left by B.S.RAO on May 26, 2010 2:16 AM

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Efficiency"the degree of economy with which process consumes resources especially time and money".
Effectiveness" how well the process actually accomplishes its intended purpose here again from the customer point of view"
Left by rakshya nepal on Jul 17, 2010 11:13 PM

# re: Efficiency Vs Effectiveness
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Efficiency"is the capacity of doing the job right...
Effectiveness" is the way of matching right job with right employee..
Left by rakshya nepal on Jul 17, 2010 11:15 PM

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Efficiency is the end product of being effective... How can you be effective with the things that you are doing if you are not efficient? e.g... in school... if the teacher is not efficient of researching the innovative technology that we have today, how do you will the student be effective?
Left by tet co on Aug 06, 2010 6:29 PM

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Efficiency and effectiveness are both commonly used management terms. If you look for both terms in most dictionaries you'll very similar definitions (which make the matter even more confusing). Yet, while they sound and start with the same letters, they both mean different things.
Left by jessica ann on Sep 30, 2010 7:25 AM

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efficiently related wiyh timw
effectiveness related to quality
e.g boss told you that i need 20 unit ofcomputer in 6day . they produce 20 unit in 6day intime (efficiency)
but the quality is not good as compare to previous computer produce by employer (not effectivness)
Left by farooq marwat hazara university on Oct 12, 2010 11:23 AM

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Efficiency is the cost & Effectiveness is the value
Left by Sanjay Garg on Dec 02, 2010 2:25 AM

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In the world of security, effectiveness means ensuring that sustainable peace is achieved for a conflict situation; efficiency means, achieving the peace by means and processes where all parties to the conflict win,there is less aggregate harm, the resources used are cost effectively applied and an optimal time is used.
Left by George Ochieng on Jan 07, 2011 9:48 AM

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EXELLENT!!!
Best regards frm Belgrade Sebia
Left by Slobodanka Veljic Jelic on Mar 05, 2011 12:06 PM

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Hello This is ok.
Left by Farzana on Mar 20, 2011 9:59 PM

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Good definition! it's clearer now, thanks.
Left by Alia on May 09, 2011 11:30 AM

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Good day, am presenting myself.

I want to thank you for the definition of those 2 concepts. I had a defintion from the book of Steven R. Covey. I hear those concepts often and I realized that lots of people do not know the difference of them. Thanks again for those explainations.

Regards, Math.
Left by Mathieu on Jun 26, 2011 2:43 PM

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True, Efficiency is a measure of inputs vs outputs while effectiveness is a measure of outputs vs outcomes ie is the desired objective achieved
Left by NYADOI ANNA on Jul 06, 2011 12:02 AM

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pls send the information to me
Left by onyekachi chilaka on Jul 08, 2011 2:40 AM

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am okey. tnxs
Left by okoro on Jul 11, 2011 4:00 AM

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i want to know the correlation between effective and efficient of advertising


Left by opmath on Aug 23, 2011 8:26 AM

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send me comment on re: Efficiency Vs Effectiveness
Left by anand atole on Oct 04, 2011 6:43 AM

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non
Left by jerome casas on Dec 04, 2011 6:29 AM

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Effectiveness is Governance, Efficiency is Management
Left by Sethuramasamy on Jan 17, 2012 10:16 AM

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efficiency to mesure the quality
Left by raj on Jan 24, 2012 5:32 AM

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Effective means achieving the goal in a sustainable manner or with a high quality while Efficiency is to achieve this goal with the minimum used resources.
Left by BAHATI M on Feb 10, 2012 8:33 AM

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It is too clear. Thank you
Left by Henok Heyene on Feb 18, 2012 2:34 AM

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I agree that efficiency is related with input and output (product)and effectiveness is related with output and outcome (customer feedback). Now outcome give direction to be more efficient as based upon outcome we can improve inputs, resources and controls to get more and better output.
Left by zahid Hussain on Jun 27, 2012 2:48 PM

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Efficiency Vs Effectiveness
Effective, means achieving your goal as it is while efficiency means achieving your goal using minimum resources.
Left by BAHATI on Jun 29, 2012 3:53 PM

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