Version 1.0, August 31, 2001, Copyright, Hugh Jack 1993-2001
· Cost estimating attempts to estimate to estimate the value put into a product by each operation.
· Cost estimates are based on historical records of expenses for equipment.
· Costs are made up of a variety of components,
· Estimated variables for a single product/unit. NOTE: yearly estimates are typically made by management.
· We can write equations for the simple relationships,
· We can select a profit using market conditions,
· We need to estimate the total time for the job using the process plan.
· We can then include time to find the various costs. There are many ways to do this - this is one possible way.
· Some costs must be specific to materials used. Depending upon suppliers, shipping, handling, etc. these costs will vary widely. If we use a fairly consistent supplier we can use,
· We can estimate indirect labor costs using an assumption that most labor types are fairly similar (this is not true but other book keeping problems may encourage this).
· For continuous-long running jobs (minimal setups) using the process plan time estimates we are already to estimate the direct labor costs.
· We can estimate direct material costs two ways using the process plan, the AMCE, and quotes from suppliers.
· Jobs may run in small batches and require setups and multiple steps on a machine. We can do a more detailed cost estimate based on operation steps (using section 5 in the AMCE).
· If operations at a machine contain multiple steps we can develop a more detailed estimate using the information in section 5 of the AMCE. To do this we need to break each operation down to specific steps. Detail is critical with this method.
· We can use a tabular format (based on a process plan) to calculate,
******************** find a financial statement
**************************** find a simple part design