The Operation process chart shows the relationship among operation process, before and after operation process (preceeding process and leading process) of the parts or components, the inspection and the delay time temporarily and the storage of the final product. It is also, if any link with assembly process between parts or components related. The operation process chart also show us the processing time needed.
The Assembly chart principally a reverse of the operation process chart. It show us the relationship among parts/components needed (in units), small additional components, and also time needed to assemble these. At the end part of the assembly chart, we will see the assemled product.
From to chart tells us the direction flow of the material or parts which will be proceed or which will be move from one place to another place. The places showed are meaningfully process, or critically time needed.