faction during Proceu 169 



u urk they have K- kirul of material moving 



>ugh them, ami the course it follows. In to 

 ig, you will gain a better understanding of 

 why there arc so many types, and you will have 

 a better gntp of the great problems which under- 

 lie the economic handling of materials in industry. 



Section III 

 Inspection during Process 



for Inspection. We have al- 

 ready considered the inspection of raw material, 

 .my attempt at all to maintain a high 

 larJ of product, there must be, not only an 

 inspection of the finished product, but also an 

 inspection while the material is in process. Im- 

 perfections may develop in the material during 

 manufacture which could not have been caught 

 in the raw state and might be so hidden by the 

 later process of manufacture that they would not 

 up even in the inspection of the finished 

 product. Deft ork might, therefore, go 



>hop. 1 he (jnaliiy of machine work, 

 for instance, often can be inspected only before 

 s been assembled, as it may be com- 

 pletely hidden in the Hnishr net. An exam- 

 ple of this would be the interior parts of an auto- 

 mobile engine, such as the crank shaft or valves. 

 Possible failure on the part of a workman is 

 one of the elements which necessitates in- 

 spection Tools wear and machines get out of 

 adjustment, causing variations in size of work. 



