STUDI KASUS PERENCANAAN PRODUKSI AGREGAT BISKUIT MARIE PADA SUATU PERUSAHAAN BISKUIT DI MALANG
ABSTRACT: The aim of this
research were to forecast a weekly demand of marie biscuit in the next 6 months
and to determine the optimal production aggregate planning that minimizes total
cost. The planning, made for the period of August 2005 to January 2006, was based
on the previous weekly demand in the period from August 2004 until July 2005.
The demand of marie biscuit was forecasted using Winters’ for Additive
Method that produced the least mean square error and then the demand
forecasting was obtained by means of the Minitab for Windows Version 14. A
weekly inventory and an aggregate production were planned using the Dynamic
Programming approach by means of a computer software which was developed using
the Delphi for Windows version 5.
The results showed that the highest demand was found in the forth week of
January 2006 (2,534 kg ) and the lowest one (2,394 kg) was predicted to occur
in the first week of August 2005. The weekly inventory level of the marie
biscuit factory was between 185 kg to 225 kg in 24 weeks planning horizon.
Overtime works would be necessary if the demand exceed the maximum regular
production capacity. However, in case of the demand and the production quantity
were lower than that of the regular production capacity, an introduction of undertime
cost in the first and third weeks of the planning horizon would reduce the
total cost by Rp 73,470 per week. The minimum total cost of the aggregate marie
biscuit production planning in 24 weeks planning horizon was Rp 96,602,174.
Key words: aggregate
production planning, demand forecasting, Dynamic Programming
Penulis: Endah Rahayu Lestari,
Retno Astuti, Heny Mardiastutik
Kode Jurnal: jppertaniandd050034
