2. Research methodology
2.1 Collect data
The selected C category products data were collected by using process charts. The chart is a useful way of
recording the essential features of a work situation for subsequent analysis. Operation, inspection, transport, storage
and delay are used as symbols to link together in a vertical chart representing the process.
2.2 Construct AS-IS value stream mapping
Value stream mapping (VSM) was adopted for the current situation to categorize value of activities. VSM is
a visual lean tool for classifying the manufacturing processes in terms of value or wastage. All bottlenecks were also
disclosed in the production flow. This research focused on inventory waste, transportation waste and waiting waste.
2.3 Map TO-BE value stream mapping
A future state map was drawn as a picture of how the system should improve the inefficiencies. This map
becomes the source for making the required changes to the system. The proposed future state map was aimed to
eliminate wastes by applying on technical implementation related to the use of the lean concept such as the two-bin
system combined with IT.