Q4 [20 marks (a) Write down the steps followed in "time study' to determine the standard time. (5 Marks) (b) An office worker, performing three work elements of a task, has been clocked, with the data shown in Table 5. The allowance for such tasks is usually taken as 15%. Table 5 Data on performance time of three elements of a task Element Observations (seconds) Performance 1 2 3 4 5 6 Rating (%) 1 13 11 14 16 51 15 100 2 3 21 25 73 26 23 110 3 3.0 3.3 3.1 2.9 3.4 2.8 120 Evaluate the normal time and the standard time. (5 Marks) (e) Discuss the role of an efficient scheduling in manufacturing. Six jobs at a tool and die shop must be processed through two work centers (drill press and lathe). The time for processing each job is given in Table 6. Table 6: Processing times for jobs in hours) Job A B D Work Center 1 (Drill press) 5 3 17 15 Work Center 2 (Lathe) 13 9 8 13 E 12 8 F 10 15 Apply Johnson's rule to find the optimum sequence for processing the jobs. (10Marks)