QUESTION FIVE al Jobs A, B, C, D, E, F and must go through Machines M1 and 2 in that sequence, as shown in the table below. Use Johnson's Rule to determine the almal sequence in which to schedule the jobs to minimise the total required time How much total time is required to process all the seven jobs? Illustrate this using a Gantt Chart (15 MARKS) Job Processing time on M1 Processing time on M2 A 8 B 16 14 8 7 D 12 13 3 F 9 6 G 3 5 4 Page 3 of 7 b) A company does heat treatment jobs for customers. Each job usually requires a different sol- and these changeovers have different costs. The company must decide the job sequence for the 8 jobs to minimise change-over costs. The table below shows the changeovercosts between jobs F G H 20 FACILITY CHANGE-OVER COSTS (5) JOBS THAT PRECEDE A B D E 15 12 20 10 15 7 10 20 6 20 35 27 25 10 10 35 15 A B 20 15 5 17 10 20 10 JOBS THAT FOLLOW O 25 10 11 _ E 20 25 15 30 15 25 25 F 30 5 12 35 G 25 30 . 15 30 12 15 25 24 11 20 30 5 10 20 25 17 Use the last change over rule to develop a job sequence. What the total change over cost for the eight jobs? (10 MARKS) ITOTAL: 25 MARKSI