Sheet metal shops differ widely in size, number of employees and types of products. In preparing this introduction to lean production, we have tried to account for the fact that no two sheet metal shops are alike and to present the information in a way that is useful to almost everyone.
To do that, we have chosen to use lightweight, rectangular ductwork fittings as our example throughout. We believe it makes use of a process that any shop engaged in repetitive work can relate to. The process of creating fitting is generally the same in any shop. We cut the pieces, stiffen the large pieces, form corners, form the connecting edges, cut and glue insulation, and finally, assemble the piece.