TABLE OF CONTENTS Two appendices on work sampling, Apps. G and H, contain the reports of actual studies. This type of productivity study is the primary measure of planning and scheduling effectiveness. Consultants typically conduct work sampling studies. Both example studies contain complete procedures for conducting an in-house study. Appendix G shows a streamlined, simple study requiring a minimum of effort. Appendix H contains a more traditional study with many more measurement observations. The traditional study contains a section validating the accuracy of streamlined studies.
This appendix includes the details, results, and analysis of an actual wrench time study, and a procedure for doing an in-house study without the need for a consultant. This appendix is a shortened version of a full-blown study that is shown in the next appendix, App. H. Such a ministudy adequately establishes a measure of the so-called wrench or direct work time of a craft for the purpose of improving a planning and scheduling operation.
( Note: Although this is a copy of an actual work sampling study, the names have been changed. Minor areas have also been altered to clarify peculiar company jargon and further author s notes have been inserted to call attention to particular details.)
A work sampling study was performed in-house by North Station I&C Maintenance. This study measured current performance and provided a baseline against which to compare future studies. It also helped station personnel become accustomed to being measured. The study used the same observation and analysis criteria as previous studies had done for the mechanical maintenance craft.
