The next step is to identify the parameters that influence the objective. This can be achieved through cause analysis tools like 5 whys, fishbone analysis, or root cause analysis.
It is important to select only those parameters that have a clear and measurable impact on objectives.
For instance, if the objective is to reduce the cost of a finished product, then the influencing parameters could be development cost, prototyping cost and compliance cost. Further, material cost, labour cost and production cost can also be attributed.