163x Filetype PPT File size 0.23 MB Source: elsmar.com
Capacity Requirements Planning Capacity Requirements Planning • Capacity Requirements Planning is a Capacity Requirements Planning is a computerized technique for projecting resource computerized technique for projecting resource requirements for critical work stations. requirements for critical work stations. – Inputs: Inputs: •Planned order releases Planned order releases •Routing file Routing file •Open orders file Open orders file – Outputs: Outputs: •Load Profile for each work center Load Profile for each work center Definitions Definitions • Planned Order Releases: Information from the Planned Order Releases: Information from the Material Requirements Planning which tells when you Material Requirements Planning which tells when you should start the order so it can be completed on time. should start the order so it can be completed on time. • Routing Files: Information that details the Routing Files: Information that details the requirements of equipment and labor to complete the requirements of equipment and labor to complete the order as needed in the required time frame. order as needed in the required time frame. • Open Orders Files: Information regarding the orders Open Orders Files: Information regarding the orders that are currently started and need to be completed. that are currently started and need to be completed. Capacity Requirements Planning Capacity Requirements Planning • A tool for: A tool for: – determining capacity that is available and determining capacity that is available and required. required. – Alleviating bottleneck work centers. Alleviating bottleneck work centers. • Helping planners make the right Helping planners make the right decisions on scheduling before problems decisions on scheduling before problems develop. develop. • Verifies that you have sufficient capacity Verifies that you have sufficient capacity available to meet the capacity available to meet the capacity requirements for MRP plans. requirements for MRP plans. What is Capacity? What is Capacity? • The work that the system is capable of The work that the system is capable of doing in a period of time. doing in a period of time. • It must be determined at different It must be determined at different levels: levels: – plant plant – department department – work center. work center. • It is normally stated in standard hours of It is normally stated in standard hours of work. work. What is Capacity? What is Capacity? • Capacity = (no. of machines or workers) x (no. Capacity = (no. of machines or workers) x (no. shifts) x (utilization) x (efficiency) shifts) x (utilization) x (efficiency) (Russell & Taylor) (Russell & Taylor) • Best operating level is the percent of capacity Best operating level is the percent of capacity utilization that minimizes average unit cost. utilization that minimizes average unit cost. – Usually 80% with a 20% cushion Usually 80% with a 20% cushion
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