What is the Best Technique?

What is the Best Technique?

Emilia Mendes (University of Auckland, New Zealand)
Copyright: © 2008 |Pages: 35
DOI: 10.4018/978-1-59904-135-3.ch008
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Abstract

Although numerous studies on Web effort estimation have been carried out to date, there is no consensus on what constitutes the best effort estimation technique to be used by Web companies. It seems that not only the effort estimation technique itself can influence the accuracy of predictions, but also the characteristics of the data set used (e.g., skewness, collinearity; Shepperd & Kadoda, 2001). Therefore, it is often necessary to compare different effort estimation techniques, looking for those that provide the best estimation accuracy for the data set being employed. With this in mind, the use of graphical aids such as boxplots is not always enough to assess the existence of significant differences between effort prediction models. The same applies to measures of prediction accuracy such as the mean magnitude of relative error (MMRE), median magnitude of relative error (MdMRE), and prediction at level l (Pred[25]). Other techniques, which correspond to the group of statistical significance tests, need to be employed to check if the different residuals obtained for each of the effort estimation techniques compared come from the same population. This chapter details how to use such techniques and how their results should be interpreted.

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Table of Contents
Acknowledgments
Emilia Mendes
Chapter 1
Emilia Mendes
The objective of this chapter is threefold. First is to introduce new terminology that relates specifically to hypertext, the model the Web is based... Sample PDF
What is Different about Web and Software Projects?
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Chapter 2
Emilia Mendes
Software effort models and effort estimates help project managers allocate resources, control costs, and schedule and improve current practices... Sample PDF
Introduction to Web Cost Estimation
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Chapter 3
Emilia Mendes
Building effort models or using techniques to obtain a measure of estimated effort does not mean that the effort estimates obtained will be... Sample PDF
How Accurate is an Effort Model?
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Chapter 4
Sizing Web Applications  (pages 78-119)
Emilia Mendes
Surveying and classifying previous work in a particular field brings several benefits, which are to (a) help organise a given body of knowledge, (b)... Sample PDF
Sizing Web Applications
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Chapter 5
Emilia Mendes
Software effort models and estimates help project managers allocate resources, control costs, and schedule and improve current practices, leading to... Sample PDF
Web Effort Estimation Usiing Regression Analysis
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Chapter 6
Emilia Mendes
Software practitioners recognise the importance of realistic effort estimates to the successful management of software projects, the Web being no... Sample PDF
Web Effort Estimation Using Case-Based Reasoning
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Chapter 7
Emilia Mendes
The use of realistic effort estimates is fundamental to both software and Web project management as they help project managers allocate resources... Sample PDF
Web Effort Estimation Using Classification and Regression Trees
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Chapter 8
Emilia Mendes
Although numerous studies on Web effort estimation have been carried out to date, there is no consensus on what constitutes the best effort... Sample PDF
What is the Best Technique?
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Chapter 9
Emilia Mendes
Numerous Web development companies worldwide do not employ formal techniques to estimate effort for new projects, thus relying on expert-based... Sample PDF
How to Improve Your Company's Effort Estimation Practices
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Chapter 10
Emilia Mendes
The objective of this chapter is to provide an introduction to statistical techniques and concepts that are frequently used when dealing with data... Sample PDF
Understanding Project Data
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Chapter 11
Emilia Mendes
The objective of this chapter is to motivate the need for empirical investigations in Web engineering, and additionally to describe the three main... Sample PDF
The Need for Empirical Web Engineering: An Introduction
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About the Author