Cost Reduction
Cost reduction requires a study using relative costs as an important parameter. The unit cost of a product can vary widely. Unless highly automated, assembly operations for such products can become a significant portion of the overall cost.Cost reductions can be achieved by a thorough analysis of all the cost incurred in each phase in the manufacture of a product. Some opportunities for cost reduction are following:
- Simplifying part design and the number of subassemblies required.
- Specifying broader dimentional tolerances and allowing rougher surface finish.
- Using less expensive materials
- Investigating alternative methods of manufacturing
- Using more efficient machines and equipment(Kalpakjian S., Schmid S.R., Manufacturing engineering and technology, 5th Edition, pg. 1265)
Random Sampling
Taking a sample from population or lot in which each item has an equal chance of being included in the sample. Thus, when taking samples from a large bin, the inspector should not take only those that happen to be within reach (Kalpakjian S., Schmid S.R., Manufacturing engineering and technology, 5th Edition, pg. 1121).
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