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A PCB (printed circuit boards) manufacturing company fabricates to customers requirements. As soon as a customer order is confirmed, the company starts the design process (Engineering) and makes a schedule for production of an initial quantity (loaded  quantity). After production, each board is tested in Test process. When a defect in any PCB is found, the PCB will be scrapped.

The finished quantity is the quantity of good products that have passed quality tests. If the finished quantity is less than the quantity ordered (wanted), an internal remake has to be done. The allocated quantity is the quantity despatched to customer. For any customer returns, the company will remake the product (customer remake) and refund the customer.

Since each type of PCBs is designed for specific requirements, any unsold product is assumed to be dead stock.

The process flow is illustrated in figure 1.

The data of six-month sales and production can be found in an Excel file, PCBs.xls, which can be downloaded from the ELE of the module.

Please note that PCBs/panel shows the number of PCBs contained in a panel which is the minimum production unit in order to fit to the fixtures in production.

Write a report, which should be limited to 2000 words, assuming to be submitted to chief executives of the company on the problems you have found based on the data available.

You may determine the structure of the report, but it should have an executive summary in the first page and the main body of the report starts with an introduction and ends with conclusions. It may help to think about the following issues.

  • What are the different types of waste which can be found from the data?
  • How many PCBs are wasted and how much in materials cost of each type of the wastes? (You need to define and provide formulas of calculating each type of the wastes. You may assume the materials cost takes 25% of the sales price.)
  • What could be the reasons for each type of waste? What are the relationships among different types of waste?
  • What do you think is the major problem at the company? And why?

The reports are to be submitted to the Harrison e-submission system (please follow the  procedure described on ELE to make your submission). The mark of the assignment (40% of the module) is distributed to the following assessment items.

  1. Executive summary and introduction 10%
  1. Calculation of the relevant quantities and costs 30%
  1. Analysis of the results 30%
  1. Conclusion development 20%
  1. Report presentation including conciseness 10%

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