Evaluating paper machine operation - 1. Equipment and operation - (b) lost efficiency analysis - Lost efficiency analysis identifies deficiencies in operation.

This paper is the second part of a three-part description of a method for evaluating the equipment;md operational aspects of a paper machine operation as part of a paper mill system. A paper machine's efficiency tends to be rather stable, despite partial rebuilds, speedups, crew training and management changes. Lost Efficiency Analysis is a tool for evaluating the operation of a paper machine, and for increasing machine efficiency. The Analysis identifies which deficiencies in an operation are major and which are minor,so that efforts can be focused into the most significant areas. This paper clarifies what Lost Efficiency Analysis is, what lost efficiency data are required, and how these should be used to clearly identify shortcomings in the machine system and management, so that effective corrective actions can be taken that improve a machine's long-term efficiency level.