Original Date: 02/19/2007
Revision Date: / /
Information : Process ModelTM Simulation
Raytheon’s Network Centric Systems Manufacturing Center in Largo, Florida, has implemented Process ModelTM simulation software to assist in the visualization and analysis of processes to improve productivity.
Raytheon’s Network Centric Systems (NCS) Manufacturing Center in Largo, Florida, uses Process ModelTM software in its Integrated Product Development System to conduct process model simulation, which facilitates the visualization and analysis of a process to improve productivity.
Before using process model simulation, spreadsheets were used to estimate the throughput of a process. Spreadsheets were based on labor standards and the number of people involved in the process. Analysis based on these spreadsheets often did not account for shared resources and process variations; i.e., the influence of test equipment and manpower being shared among projects was seldom captured. Similar items were also frequently considered to have identical processes.
The new process simulation model begins by creating a flowchart of the value stream for the process. Flowcharts are progressively updated by the insertion of information for the process steps that include process step queue and transport times along with machine capacities, yields, and resource and labor allocations. Process experts then validate the model using historical data and data from similar processes. The simulation is run after validation is complete.
Process model simulation now provides quantifiable data on the target process or subprocess and the capability to improve manufacturing flows and cycle times while accounting for process variations. Constraints are identified, quantified and then modified or eliminated to create a more efficient and productive process. This method also allows for the ability to examine “what-if” scenario changes, which enable the optimization of resource allocations and provide for capacity planning.
Raytheon Largo has realized significant benefits from the use of Process Model™ simulation. The facility now has the capability to simulate, analyze, and improve manufacturing flow and cycle times. Process performance can be predicted using data (or estimates) accounting for variation and interdependencies. Current operations can be accurately evaluated to identify unnecessary process steps, duplication of effort, inappropriate resource allocation, constraints, and bottlenecks. Maximum throughput can be determined to enable Raytheon Largo to analyze resource requirements for personnel and equipment, while optimal lot sizes can also be identified to maximize resource utilization or minimize work in process.
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