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An Appropriate Use of Metrics

Patrick Kua

Management love their metrics. The thinking goes something like this, "We need a number to measure how we’re doing. Numbers focus people and help us measure success." Whilst well intentioned, management by numbers unintuitively leads to problematic behavior and ultimately detracts from broader project and organizational goals. Metrics inherently aren’t a bad thing; just often, inappropriately used. This essay demonstrates many of the issues caused by management’s traditional use of metrics and offers an alternative to address these dysfunctions.

19 February 2013

article


EstimatedInterest

TechnicalDebt is a very useful concept, but it raises the question of how do you measure it? Sadly technical debt isn't like financial debt, so it's not easy to tell how far you are in hock (although we seem to have had some trouble with measuring the financial kind recently).

10 December 2008

bliki


PurposeOfEstimation

My first encounter with agile software development was working with Kent Beck at the dawn of Extreme Programming. One of the things that impressed me about that project was the way we went about planning. This included an approach to estimating which was both lightweight yet more effective than what I'd seen before. Over a decade has now passed, and now there is an argument amongst experienced agilsts about whether estimation is worth doing at all, or indeed is actively harmful . I think that to answer this question we have to look to what purpose the estimates will be used for.

27 February 2013

bliki


StandardStoryPoints

I've heard a couple of questions recently about coming up with a standard story point mechanism for multiple teams using extreme programming's planning approach. The hope is have several teams all using equivalent story points, so that three story points of effort on one team is the same as on another.

I think trying to come up with this at best of limited value, and at worst dangerous.

6 September 2004

bliki


WhatIsFailure

CHAOS report says only 34% of projects succeed.

The Standish Group's CHAOS report has been talking of billions of wasted dollars on IT projects for many years. The 34% success rate is actually a improvement over 2001's figure of 28%. But what do we really mean by 'failure'?

15 May 2003

bliki

CannotMeasureProductivity

We see so much emotional discussion about software process, design practices and the like. Many of these arguments are impossible to resolve because the software industry lacks the ability to measure some of the basic elements of the effectiveness of software development. In particular we have no way of reasonably measuring productivity.

29 August 2003

bliki


FivePoundBag

You can't put ten pounds of shit into a five pound bag

-- Anyone who has tried

When Kent and I wrote Planning Extreme Programming, we included this whimsical quote to help get the essence of what planning is about.

13 October 2005

bliki


RigorousAgile

I often run into a complaint that agile methods don't have a rigorous definition. The complainer may talk about how this means that you can't tell if a particular team is using an agile method or not. They may also say that this makes it hard to teach people how to do agile methods - what's the curriculum?

To some degree I do feel the pain of this complaint - but I accept there is no cure. This lack of rigorousness is part of the defining nature of agile methods, part of its core philosophy.

29 May 2005

bliki


TestCoverage

From time to time I hear people asking what value of test coverage (also called code coverage) they should aim for, or stating their coverage levels with pride. Such statements miss the point. Test coverage is a useful tool for finding untested parts of a codebase. Test coverage is of little use as a numeric statement of how good your tests are.

17 April 2012

bliki