#TELELOGIC FOCALPOINT SOFTWARE#
Karlsson, J., Wohlin, C., and Regnell, B., An Evaluation of Methods for Prioritizing Software Requirements, Information and Software Technology, pp.Karlsson, J., and Ryan, K., A Cost-Value Approach for Prioritizing Requirements, IEEE Software, pp.Karlsson, J., and Ryan, K., Supporting the Selection of Software Requirements, Proceedings of the 8th workshop on Software Specification and Design, pp.Karlsson, J., Software Requirements Prioritizing, Proceedings of the International Conference of Requirements Engineering (ICRE'96), pp.830-1998, IEEE Recommended Practice for Software Requirements Specifications, 1998. Harker, P.T., Incomplete Pairwise Comparisons in the Analytic Hierarchy Process, Mathl.Fenton, N.E., and Pfleeger, S.L., Software Metrics - A Rigorous and Practical Approach, PWS Publishing Company, 1997.Carmone, F.J., Kara, A., and Zanakis, S.H., A Monte Carlo Investigation of Incomplete Pairwise Comparison Matrices in AHP, European Journal of Operational Research, Vol 102, pp.Beck, K., Extreme Programming Explained, Addison-Wesley, 1999.
The requirements selection decisions based on ordinal scale data agree substantially with the decisions based on ratio scale data. The cost-value approach based on ordinal scale data also seems feasible. It indicates that some of our subjects tend to use the extreme values of the scale while others are more modest. The skewness measure seems feasible to determine in which cases the ratio scale is valuable. Four different empirical data sets were used to verify the suggested approaches. The paper suggests an approach to measure the skewness of the ratio distribution and a way to use the cost-value approach on ordinal scale data. Thus, there is a trade-off between simple techniques only providing ranks and complex techniques providing information about the relative distance between requirements priorities. This is important since techniques using a richer scale tend to be more time-consuming and complex to use. This paper aims to investigate the differences between the scales used in prioritisation.
the ratio scale is richer than the ordinal scale. Some measurement scales provide more information than others, i.e. A number of different techniques for prioritising requirements have been proposed, some based on an ordinal scale, others on a ratio scale. The importance of prioritising requirements is widely recognised.
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