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Chapter 6

GMS 401 Chapter Notes - Chapter 6: Process Flow Diagram, Flexible Manufacturing System, Direct Numerical Control


Department
Global Management Studies
Course Code
GMS 401
Professor
Robert Meiklejohn
Chapter
6

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Chapter(6(!Process'Design'and'Facility'Layout"
!
Process'Types'
o Job$Shop$
! Used!when!a!low!volume!of!high!variety!of!customized!
products/services!is!needed!
o Batch$Processing$
! Used!when!a!moderate!volume!or!variety!of!goods!or!services!
is!desired!
o Repetitive$processing$
! Used!when!higher!volumes!of!more!standardized!
products/services!are!needed!
o Continuous$process$
! Used!when!a!high!volume!of!highly!standardized!output!is!
required!
Automation'
o Using!machinery!that!has!sensing!and!control!devices!that!enable!it!to!
operate!automatically!
! Fixed$
Uses!high;cost,!specialized!equipment!for!a!fixed!
sequence!of!operations!
Most!rigid!
Good:!Low!unit!cost!and!high!volume!
Bad:!Minimal!variety!and!high!cost!in!making!changes!
! Programmable$
Uses!high;cost,!general!purpose!equipment!controlled!
by!a!computer!program!
Good:!can!produce!fairly!wide!variety!of!low;volume!
products!in!small!batches!
Bad:!Downtime!when!changing!program!
Numerically+controlled+(N/C)+machines+
o Machines!that!perform!operations!by!following!
mathematical!processing!instructions!
o Computerized+numerical+control+(CNC)+
! When!each!machine!has!its!own!computer!
o Direct+numerical+control+(DNC)+
! One!computer!controls!many!
o Good:!Small!batches,!frequent!design!changes!
o Bad:!High!skill!levels!needed!to!program,!high!
cost!
! Flexible$
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