Waste Simplification for Warehouse Using Boolean Logic

Abstract

Warehouse accumulates non-value added or wastes activities consist of inventory, waiting and
transportation. The warehouse is a must to prevent any unforeseen events causing failures to implement the
Just-In-Time concept. However, the existence of the warehouse will increase the operation expenditure and
can lead to the profit losses. Therefore, the manufacturer needs to identify and eliminate the wastes to reduce
the consumption of the resources and keep minimum requirement of the activities such as inventory, waiting
and transportation in the warehouse. Value Stream Mapping is one of the Lean tools as an approach to
eliminate the non-value added or wastes. This tool visualizes the information and material flow of the
manufacturing activities. The development of a model based from Value Stream Mapping determined the
current state of the wastes existed in the warehouse activities. The model is used to identify and eliminate the
waste in the warehouse. From the information flow, the optimum combination of the wastes was determined
through Boolean concept. The wastes are simplified and combined by passing through the Boolean operators
consist of AND Gate and OR Gate. The expected outcome of this paper is to propose a conceptual model of
new value stream mapping to identify and eliminate the waste in the warehouse. From the removal of wastes,
the profit can be increased by reduction of the operation expenditure of the manufacturer.