Simplicity efficiency

Complexity

Figure 15.4—Simplicity efficiency boundary i \

Key:

a-b ineffective level of insight b-d effective and efficient boundary b-c first-pass range for models (target - may not be achieved) c-d last-pass range for models when more Insight Is useful (target) e inefficient approach .

Simplicity

Complexity

Figure 15.4—Simplicity efficiency boundary that is both effective and efficient. Chapman and Ward (2002) develop this simplicity efficiency concept further, in terms of concepts and processes as well as models.

Simplicity efficiency might be termed simplicity-insight efficiency (SI efficiency for short), especially if the term risk-reward efficiency (RR efficiency) is adopted instead of risk efficiency. The term SI efficiency emphasizes the nature of the trade-off between simplicity and insight along an efficient frontier or boundary that is directly comparable with the RR trade-off associated with risk efficiency. This book will stick to the term simplicity efficiency. But it is important to see the conceptual link between simplicity efficiency and risk efficiency. Risk efficiency is a property of projects that we try to achieve as a basic objective common to all projects. Simplicity efficiency is a property of RMPs that we try to achieve with respect to all RMPs. Simplicity efficiency is a necessary condition for risk efficiency. Both effectiveness and efficiency in project terms requires simplicity efficiency.

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