MODEL PERSEDIAAN ECONOMIC PRODUCTION QUANTITY (EPQ) DENGAN PARAMETER FUZZY DAN WAKTU TUNDA
In this thesis, an EPQ inventory model is constructed,first, by involving demand rate and deterioration rate as fuzzy number, and second, by including delay time in the deterioration term. The objective is to minimize the inventory cost. For the first case, the max-min operator is used to obtain an...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/15034 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | In this thesis, an EPQ inventory model is constructed,first, by involving demand rate and deterioration rate as fuzzy number, and second, by including delay time in the deterioration term. The objective is to minimize the inventory cost. For the first case, the max-min operator is used to obtain an optimal solution of fuzzy total cost. From numerical simulations, results show that the fuzzy total cost is less than the non fuzzy total cost. For the second case, the delay affect the model to have oscillatory and non oscillatory solutions depending on the magnitude of the delay. For this case, the analytic solution using the first order of the Lambert W Function is compared to the numerical solution of the delay differential equation. Results show that both are quite in agreement. |
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