In addition to the stores organization, it is necessary to develop a part information database for all of the parts that will be stocked in the storeroom. One of the first steps in this process is to clearly identify all of the spare parts. Once they are clearly identified, it is necessary to number each of the spare parts. In some organizations, the part number is merely some type of a sequential number. However, the preferred method is to make an intelligent numbering system for spare parts. Parts should be identified with some type of class or subclass, then the second part of the number should be a specific identifier. Even a description of the part could be included in the number.

In some companies, commodity codes are used to start the part number. This code indicates the type of item that is being specified, and is usually a 2- or 3-digit number. Figure 1-8, which provides a sample numbering system, starts with a type code. This type code will set the general classification, or the spare part. For example, type code 000 will always be the class for mechanical power transmission. Type code 200 will always start the fluid power spare parts. Type code 500 will always be fasteners.