180 Mtili-r'uils and Their Handling 



Part No. 2 must start on April 24th, and so on. 

 Fart No. 3, which requires only two operations, 

 need not be started before May 10th. Parts 5 

 and 6 are brought together in sub-assembly before 

 they enter the final assembly. In the sub-assembly 

 condition they require three operations and must, 

 therefore, be brought together by May 2nd, and 

 the separate parts started on April 13th and 15th 

 respectively. The last three pieces have one oper- 

 ation together which requires that the second sub- 

 assembly must be made on May 26th. Parts 7 

 and 8 must be brought together in a first sub- 

 assembly May 1st, which means that Part 7 must 

 start on April 10th, while Part 8 must be started 

 on April 24th. 



In this way, by working backward from June 

 1st, the time for each sub-assembly and the start- 

 ing point for each piece is determined. Good 

 judgment and intimate knowledge of shop condi- 

 tions are required for intelligent scheduling; and 

 constant vigilance in following up the work must 

 be used to make sure that all the pieces "head in" 

 on schedule time. 



