APUNTS Operations Tema 4.1 &.docx

Make to stock for successful products make to order

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- Make-to-stock for successful products. - Make-to-order for really specialized and customized products.
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Measurement for performance Operation time: - Setup time: the time we require to prepare machinery before we feed the materials again. It’s expected to be reduced and optimized. - Run time: execution time. Waiting times: temps que perds sense sentit, no hauria de donar-se. it’s like raw materials waiting to be produced. Throughput time: is the average time that the material stays in the production line until we get the final product. Speed: Cycle time: is the average time between one order starts and the other one is waiting to be started. Throughput rate: is the inversion of cycle time. It’s like the production rate. Efficiency: the real output with respect to the expected or planned. Ideal to be 1. If not it means that you have waiting times or bottlenecks. Productivity: output respect to the input. Utilization: really executing order with respect to the time that we spend efficiency.
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Example Suppose you had to produce 600 units in 80 hours to meet the demand requirements of a product. What is the cycle time to meet this demand requirement? Answer: There are 4,800 minutes (60 minutes/hour x 80 hours) in 80 hours. So the average time between completions would have to be: Cycle time = 4,800/600 units = 8 minutes.
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