In: Operations Management
            CASE 4: SHORT-TERM SCHEDULING
Stan's Furniture Refinishers has 7 items of furniture to
sand first and...
                
            CASE 4: SHORT-TERM SCHEDULING
Stan's Furniture Refinishers has 7 items of furniture to
sand first and then varnish using the sending and varnishing
machines, respectively. The items and their times on these two
machines 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 optimal
sequencing of these jobs. The jobs must go through the machines in
the same order starting with the sanding machine.
 
- Identify the cumulative flow time for the initial
sequencing and for the sequencing based on the Johnson’s rule.
Provide the existing sequence chart and Johnson’s rule
charts.
 
- Compare and explain your results.