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Developing A Time And Motion Study For A Lean Healthcare Environment, Michael Winston Patton Jr.
Developing A Time And Motion Study For A Lean Healthcare Environment, Michael Winston Patton Jr.
University of Kentucky Master's Theses
This thesis outlines the development of a standard methodology for performing a time and motion study in a lean healthcare environment. Time and motion studies have been used in healthcare environments in the past, however they have nearly all been exclusive to a particular healthcare enterprise. To develop the time and motion study methodology, a study was designed to examine how resident doctors spend their time. This study was performed in response to coming changes in the work hours for all residents. Once the methodology was developed, trial observations were conducted. The data from these observations was analyzed to determine …
Achieving Ultrafine Grains In Mg Az31b-O Alloy By Cryogenic Friction Stir Processing And Machining, Anwaruddin Mohammed
Achieving Ultrafine Grains In Mg Az31b-O Alloy By Cryogenic Friction Stir Processing And Machining, Anwaruddin Mohammed
Theses and Dissertations--Manufacturing Systems Engineering
This thesis presents results from the application of cryogenic cooling on multiple-pass friction stir processing and the subsequent orthogonal machining on friction stir processed and as-received Mg AZ31B-O disks, and shows their combined effects on microstructure and microhardness values. A simple friction stir tool, a specially designed fixture and liquid nitrogen are used to perform multiple-pass friction stir processing experiments on Mg AZ31B-O alloy. The friction stir processed and as-received sheets are then made into disks for the orthogonal machining experiments. This study analyzes the microhardness, microstructure changes by cryogenic friction stir processing and the effect of machining conditions such …