CASE 4: SHORT-TERM SCHEDULING
Stan's Furniture Refinishers has 7 items of furniture tosand first and then varnish using the sending and varnishingmachines, respectively. The items and their times on these twomachines are shown in the table:
Item Sanding time,hrs. Varnishing time, hrs.
A 8 7
B 6 4
C 5 8
D 8 12
E 10 14
F 12 8
G 4 6
Questions.
- Using the Johnson’s rule, identify the optimalsequencing of these jobs. The jobs must go through the machines inthe same order starting with the sanding machine.
- Identify the cumulative flow time for the initialsequencing and for the sequencing based on the Johnson’s rule.Provide the existing sequence chart and Johnson’s rulecharts.
- Compare and explain your results.
