A matrix approach to tolerance charting

This paper presents a unique method of deriving the dimensions and tolerances during tolerance charting. It is simple and practical. Unlike other methods, it does not require any representation of the machining sequence. The dimensions/tolerances between workpiece surfaces are organised into an input matrix. The input matrix then undergoes a series of operations to yield the final matrix. The final matrix contains the resultant dimensions/tolerances between any two surfaces of the workpiece. This method is easy to understand and implement on a microcomputer. An example is used to illustrate the method.