appendix 201 Worksheet 4 : The sub-optimization analysis This is a robust and revealing analysis. It has been used in three places in this book ­ as a broad framework to consider process performance, as a diag- nostic tool to assess the gap between current and possible performance, and as a framework to summarize an internally focused strategic theme. F i g u r E A.1 The sub-optimisation analysis Key measures Projects to bridge the gap $ Difference