Home > Manufacturing, OpenERP v6.0 > Data integrity issues in MRP implementations

Data integrity issues in MRP implementations

A good description of the data integrity issues found in MRP implementations can be found in the article on MRP in Wikipedia. In a nutshell, if the

English: MRP

Image via Wikipedia

information in your manufacturing system is bad, don’t expect its planning to be any better (or GIGO). While you are implementing the MRP module in OpenERP, you should pay attention to the following information items in your systems:

  • Lead-times: critical for the timing phase of your planning. If production or supplier lead-times are not accurate, don’t be surprised to find planning dates that are not realistic.
  • Stock levels: very critical, since all the procurements are created when the stock levels drop down below its reorder point or when a customer makes an order (depending on how you have your system set-up)
  • Bills of Materials: your system will procure either raw material, work in process inventory or end-items. Which items it will procure depends on the accuracy of Bill of Materials. Your BoM needs to reflect how your product is assembled. I found some places where the BoM only reflects the cost structure of the end-item, and that is wrong. The cost of the end-item is a different problem that needs to be addressed in a different module than the manufacturing module.
  • Products: your system needs to have all the products you procure (either by purchasing or manufacturing) and sell. And its description needs to be complete.
  • MPS, or production schedule: needs to be available in order to make the plan. In all the manufacturing plants there is a production schedule. People might not be aware there is one, but actually you can find it in the daily or weekly manufacturing plans.
  • Reorder points: you need reorder points (minimum and maximum stock levels) in some products in order to not disrupt your quality of service. We will not get into the calculation of these items (by now)

    We will get into more detail on these items and how to address them in further posts

     

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