Abstract:
The coating process of hard disk drive has to respond to the requirement of customers which needed 100,000 hard disk drives per day while the maximum capacity of case company was 54,000 pieces per day. Due to the above problems, the case company needed to extra workload into two shifts in order to meet the customers requirement and to preserve the market share. Then, the objective of this research is to improve productivity of production line by reducing cycle time of any process which spends production time exceeding the takt time. As a result of that circumstance, the case company has to increase production capacity by increasing workload from one shift to two shifts.
The research methodologies consisted of implementing the seven wastes principle which are only two types of wastes emphasized in this research namely 1) the unnecessary motion and repeat the operation in the racking and packing clamper steps 2) the inappropriate processing according to using jigs and fixtures in the plating process. The improvement steps begin with using seven quality control tools to collecting data, analyzing problems and defining a feasible improvement solution by the new seven quality control tools. The principles of work study and jig and fixture design are also applied.
The result after improvement shows that the cycle time of every station is able to control under the takt time at 259.61 seconds. Then the total cycle time can be decreased to 0NN.09 seconds (26.02% improvement). The work-hours can also be decreased 8 hours (50.00% improvement) while the number of workers is reduced to 6 people (62.50% improvement). Finally, the productivity rate is increased to 362% which is able to achieve the process capacity at 100,000 pieces per day per one shift operation.