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National Institute of Technology Calicut Department of Mechanical Engineering
Industrial Engineering Lab October 2007
1
Preparation of Assembly Chart, Product structure and
Dispatch List
Aim: To prepare an assembly chart and product structure for the given hand drill. Also
prepare MRP records based on the manufacturing environment specified and develop a
dispatch list for the items.
Equipments: Hand drill, Screw Driver, Pliers, etc
Theory:
Assembly Chart: A schematic model that define how parts go together, the order of
assembly, and the overall structure of the product. This chart is ideal for getting a bird’s-
eye view of the process for producing most assembled products. It lists all major
materials and components, subassembly operations, inspections and assembly operations.
This chart is sometimes called gozinto chart.
Product Structure Diagram: It includes all of the information typically included in the
parts list as well as information concerning the structure of the product. This diagram
provides the details on the components and assemblies required for making the product.
It may also be known as bill of material. It contains the information such as, in what
sequence these items (An item may be component, subassembly or final assembly.) are
required, and how many units of components are required to produce the parent item
together with the lead-time. Product structure is an input for several planning function
especially for Material Requirements Planning (MRP). Product structure is a level by
level representation. Parts used to make items in a level are represented in a lower level.
Higher level is represented with a lower number. The level by level representation shows
a parent-child relationship. The end item is represented at level zero.
Procedure: Disassemble the given product (Hand drill). (The disassembling operation
may be carried out to the extent possible. It may not be possible for you to completely
disassemble the product.) Identify various subassemblies required to make the product.
You may get an idea about the subassemblies, from the details provided for preparation
of dispatch list given below, to make the end product. Identify the component parts or/
subassemblies required to make each of the subassemblies required. The parts required
for a subassembly can be represented in a product structure form (Single level product