DESIGN ANALYSIS OF MATERIAL LAYOUT IN WH02 PT. XYZ TOMINIMIZE WASTE USING CLASS BASED STORAGE POLICY

Abstract

The business process at PT. XYZ is supported by various divisions with its ownfunctions. One of the mentioned divisions is the Logistic division. This division
manages the procurement of goods and services for the mining process. One of the
subdivisions in Logistics is the warehouse. Warehouse handles incoming items and
items that will be distributed to users. To meet user needs, warehouse operations must
be optimized by reducing inefficient activitie. However, in reality, several problems
are still found from various indications of waste that cause delays in warehouse
operational processes. In this study, a waste analysis is conducted using the Waste
Assessment Model to determine the percentage of each waste that occurs in
warehouse activities and to identify the type of waste with the greatest impact for
potential improvement. The identification results show the percentage for each type
of waste, including waste overproduction 14,21%, waste inventory 15,25%, waste
defect 12,41%, waste motion 13,48%, waste transportation 12,92%, waste process
17,79% and waste waiting 13,59%. Based on the results of waste identification, it was
found that the waste process had the highest percentage, which is 17,79%. The root
cause of the waste process occurs in the storage and retrieval processes of materials so
that recommendations for improvement are given by relayout of material using the
class-based storage policy. The implementation of the class-based storage method can
optimize distance by 18,07%. The storage space is reduced by 10% with a reduction
of rack usage by 13. Additionally, there is an 11%