Use these equations to solve the efficiency percentage

Line Efficiency (%)=(Line output x Garment SAM)/ (Manpower x Shift hours x 60)X 100

or

Effiency= task times/(actual number of workstations x largest assigned cycle time)

8 hour work day

Figure 1. Cycle Time Workstation Duty (min) 1 Lining cupcake pan 0.5 Sifting and Mixing dry 2 ingredients 3 Mixing Wet ingredients 4 Folding Dry with Wet ingredients 5 Baking and flash freeze 21 6 Decorate 3 7 Quality Control Total Task time 34.5 Line output x Garment SAM Line Efficiency (%) X 100 Manpower x Shift hours x 60 Task times 390 PART 2 DESIGNING OPERATIONS the number of workstations required times the assigned (actual) cycle time of the low putes the efficiency of a line balance by dividing the total task times by the produ There are two measures of effectiveness of a balance assignment. The first measter workstation: (Actual number of workstations) X (Largest assigned cycle time) Efficiency stations. In this way, a firm can determine the sensitivity of the line to changes in the po Operations managers compare different levels of efficiency for various numbers of Idle time = (Actual number of workstations X Largest assigned cycle time) - 2 Task times tion rate and workstation assignments. The second measure computes the idle time for the line. Example 4 DETERMINING LINE EFFICIENCY Boeing wishes to calculate the efficiency and idle time for Example 3. APPROACH Equation (9-4) and (9-5) are applied. SOLUTION 65 minutes 65 Efficiency = 90.3% 72 (6 stations) X (12 minutes) Idle time = (6 stations X 12 minutes) - 65 minutes 7 minutes Note that opening a seventh workstation, for whatever reason, would decrease the efficiency of the ance to 77.4% (assuming that at least one of the workstations still required 12 minutes) 65 minutes Efficiency = 77.4% (7 stations) X (12 minutes) And now the idle time = (7 stations X 12 minutes) - 65 minutes les = 10 19 minutes