The work described here provides practical guidance for a new approach called Impact Ranked Obstacle Analysis (IROA), applied to assumptions about requirements. The IROA approach draws on two existing techniques, obstacle analysis (Anton, 1997) and risk analysis (Baskerville and Stage, 1996). The contribution of this work is bringing together of these techniques. As the development framework is assumed to be DSDM, and the IROA approach is used as a technique. In JAD workshops. The MoSCoW rules (DSDM, 2002) are used for prioritising Requirements.
Lowell Jay Arthur states that maintenance "means to preserve from failure or decline (L Arthur, 1992)- and evolution "means a continuous change from a lesser, simpler, or worse state, to a higher or better state. (L Arthur, 1992)-. The benefits of the IROA approach are that it provides a mechanism for gracefully preserving applications from failure by designing monitors to ignore certain dynamic inconsistencies, but monitoring the occurrences of those dynamic inconsistencies in order to predict timely graceful evolution. These monitoring are formally referred to as Graceful Evolution Monitors or GEM's. This approach would be of benefit where the application development team does not have time to wait for changes to the enmeshed systems, but still needs to build a robust application.
2.Related Work.
Baskerville and Stage (1996) look at controlling prototype development through risk analysis. They show that risk analysis in a RAD framework can be used to determine priorities, resources and activities. They suggest that risks can arise from environmental turbulence during development, causing boundaries and system tasks to continuously shift. This statement supports the concept of obstacles stopping requirements being met due to the changing basis of assumptions about the environment (Feather and Fickas, 1995).
Ryan et al (2001) use the impact ranking process of Baskerville and Stage (1996) coupled with the appliance and assessment activities of Anton and Earp (2001) to form a comprehensive risk mitigating strategy for reducing requirements creep in RAD environments.
For its pricing strategies, Carrick primary concerns should be to avoid the evolution of grey markets and as such, this report recommends a skimming strategy that is based on the top end market prices. ...