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A review of Analytical systems on line balancing, Maurice kilbridge and Leon wester, A Review of Analytical Systems of Line Balancing. Operations
from Application of Ranked Position Weighted and Kilbridge and Wester Method at Radiator Assembly Plant -
by IJRASET
III. METHODOLOGY
Assembly line balancing problem are of two categories: 1) Assume fixed cycle time and find optimum number of workstations. 2) Assume fixed number of workstations and minimize the cycle-time to minimize the total delay time. This case study uses first category of line-balancing problem.
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A. Terminology used 1) Task element(Te): It is the minimum divisible element in the assembling process. 2) Total work content (Twc): It is the sum of all elemental task times, where iis individual task times. Twc = ∑ ୀଵ ܶ݁݅ 3) Workstation process time(Ts): It is the sum of elemental task time performed at jth work station. Ts= ∑ ୀଵ ݆ܶ݁ 4) Total time available for completion(TACT) time: It is the speed with which production should proceed in order to meet customer demand. Tact time = ୴ୟ୧୪ୟୠ୪ୣ୲୧୫ୣ୭୰ୡ୭୫୮୪ୣ୲୧୭୬୮ୣ୰ ୴ୣ୰ୟୣୢୣ୫ୟ୬ୢ୮ୣ୰ୱ୦୧୲ ୱ୦୧୲ 5) Production Rate (R P ): It is the ratio of amount of units to be produced to the avsilable time. It is measured in unit / sec. R P = ୈୣ୫ୟ୬ୢ ௩௧ 6) Balance Efficiency (E): It is the measure of how good a given line balancing solution is. However it is not possible to balance a line 100% perfect. Here, ‘n’ is no. Of workstations. E = (T WC )/(n* T C ) 7) Balance delay (d): It indicates loss of time due to uneven work distributions at each station. It is opposite to balance efficiency. d = 1-E 8) Smoothing Index (SI): This index indicates relative smoothness of a given assembly line balance. SI= √(∑[ ܶܿ−ܶݏ 2 ]) Fig.1 shows the flowchart for the present research work.
Production volume
List of all assembly operations Data-collection
Operations and elemental time with MOST
LineBalancing KBW method Analysis and selection RPW Fig.1 Flowchart for research methodology method Data-Collection Assumptions Production schedule is 46,000 units/month. Taking working days as 26 in a month, and assembling tasks is continued for 3 shifts. This gives 590 units/shift. Total available time in a shift = 410min Maximum allowable station time equals to TACT time = 41.70 secs/unit Select the best one
