expensive to test any expendable device by using it. In the case of an 

 expendable BT, which requires a I, 500 foot instrumented test tank for 

 even the simplest test, acceptance tests are terribly costly. It is mandatory 

 that our technology provide for very low consumers' risk sampling plans of 

 the materials, coupled with final assem.bly processes which do not degrade 

 the quality of the parts. This feature of the planning also supports the 

 inevitable need for multiple sources of the same instrument; final tests will 

 not possibly control this product. The pieces chosen on the final parts list 

 reflected in each case a selection based upon easy and reliable sampling 

 inspections. 



In summary we commenced our design efforts only after concluding 

 four simple economic studies. First, a price-volume analysis; secondly, 

 a cost-size and complexity analysis; third, an accuracy-cost analysis; and 

 finally, a manufacturing quality control analysis. We recommend this as 

 typical of the type of contribution which economic thinking can provide as a 

 guide line for the application of the engineering and development efforts. 



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