To answer your question you need to think about the Theory of Constraints - which of the Raw Materials is your constraint?
As an example if two of the materials are common (used in other products) and one is unique you could treat that as your constraint? assuming that the other materials do not constrain the process? The other view is to look at each materials lead time - stock cost and replensihment profile (Runner - Repeater or Stranger)
So like all problems there are a number of solutions the right one is the one that works for you :-)
Hope that helps
Originally posted by: 208154
I am building the value stream mapping for one of the process of the company I work for and I am stuck because of the following doubt:
One of the products we manufacture involves mixing (following a recipe) three different raw materials in a reactor in order to get the final product. After a quality control, the product is sent to the packaging machine so that it could be stored in five liter containers.
The point is which of the three different raw materials I have to consider so that I could calculate the lead time of the whole process.
Thanks in advance for your answers.