A Dynamic Programming Approach for Preventive Maintenance of Tea Sieving Machine Components

Indonesia is rich in tea plantations. The management of tea leaves is carried out by state-owned company, that produces orthodox black tea in Indonesia. Currently, the company often experiences problems due to frequent breakdowns of the tea sieving machine, production machines used in the tea industry, especially for processing orthodox tea in the withering and grinding rooms. Machine, particularly in the lower arm component. Sudden damage to the lower arm component reduces production, resulting in production targets not being met. The company needs a maintenance schedule for the lower arm component along with the actions to be taken during periodic inspections. Dynamic programming with three decisions, that continuing to use the previous lower arm component, welding or replacing it, along with an inspection stage every two weeks with a total cost expectation minimization objective function. Based on the calculations performed, the total maintenance cost using dynamic programming is lower than the company's current total maintenance cost.