perhaps the most importance message associated with the cause-and-effect structure is that the viability of the strategy is testable. strategic feedback is available that allows managers to test the reasonableness of the strategy.For example,if the number of defective product decreases,we would expect to see an increase in market share.If not,it could to be due to one of two causes:(1)implementation problems,or (2)an invalid strategy.First,it is possible that a key performance indicator such as the number of defective units did not achieve its targeted level