A+I utilizes a Value Driver Modelling approach to quantify the stochastic impact of internal and external variation within an operation. This results in not only understanding where to start the improvement but what type (Stability before Capability and only then Capital) of improvement is required in each step of the continuous improvement roadmap.
A good manager generally knows where exactly the main bottleneck is in their operation. However, it is very difficult to know where the other main constraints are. It becomes impossible to properly debottleneck without this understanding as bottleneck can move depending on the internal and external variation and thus other major constraints must be known to get the best bang for the buck while debottlenecking.