RT Journal Article
JF 2011 15th International Software Product Line Conference (SPLC 2011)
YR 2011
VO 00
SP 223
TI Requirements Uncertainty in a Software Product Line
A1 Andy J. Nolan,
A1 Paul C. Clements,
A1 Andy Pickard,
A1 Silvia Abrahão,
K1 Requirements
K1 Uncertainty
K1 Software Product Lines
AB A complex system's requirements almost always remain uncertain late into its software development. In gas turbine engine control systems at Rolls-Royce, for a traditional project (non-product line) typically 50% of requirements will change between Critical Design Review and Entry into Service. Requirements uncertainty is particularly relevant when defining the scope of a Software Product Line. If the core asset team fails to recognise or accommodate requirements uncertainty, changes will manifest later in the product line. If the core asset team over-compensates by adding too much functionality or variability to account for a wide range of uncertainty, they will invest effort that may never be required. The optimal balance can be found through an application of requirements uncertainty analysis and understanding the balance between the impact of risk and mitigation effort. This paper first describes the use of the requirements uncertainty analysis technique at Rolls-Royce for traditional (non-product line) software development and then explains how this technique works in the context of a software product line.
PB IEEE Computer Society, [URL:http://www.computer.org]
LA English
DO 10.1109/SPLC.2011.13
LK http://doi.ieeecomputersociety.org/10.1109/SPLC.2011.13