LEAN CONCEPTS - PROCESS FLOW TIME COMPUTATIONS - MPH CASE

LEAN CONCEPTS - PROCESS FLOW TIME COMPUTATIONS - MPH CASE -...

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LEAN CONCEPTS PROCESS FLOW TIME COMPUTATIONS MIAMI PEAK HOSPITAL X-RAY DEPARTMENT CASE Note : You need a calculator or Excel to work on this case. Miami Peak Hospital (MPH) has been under recent pressure to reduce costs and improve patient service. In response, the hospital has undertaken a series of process-improvement initiatives. One of the first processes targeted for improvement is the X-ray service. Amount of time to get an x-ray is a major concern for both doctors and patients. In addition, management would like to make sure that available resources are utilized efficiently. A process-improvement team was set up to study the X-ray service process and recommend improvements. The teams identified the point of entry to the process as the instant that a patient leaves the physicians’ office to walk to the X-ray lab. The point of exit was defined as the instant that both the patient and the completed X-ray film are ready to enter the physician’s office for diagnosis. Current Process Performance To determine the flow time of the existing process, a random sample of 50 patients was observed over a two-week period. For each patient, the team recorded times of entry and exit from the X- ray service process. The difference between these two times was the used as a measure of flow time for each patient. The average of the 50 data points was 154 minutes. This figure, then serves as an estimate of the average flow time for the X-ray service process. Process Chart and Description To further study the process flow time, the team examined the entire process in detail and broke it down into the constituent activities identified in the Table 1 . The corresponding process flow chart is shown in Figure 1 . It depicts all activities and the precedence relationships among them. For example, activity 2 must be completed before activity 3 can begin.
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This note was uploaded on 07/02/2011 for the course MGSC 485 taught by Professor Ahire during the Spring '10 term at South Carolina.

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LEAN CONCEPTS - PROCESS FLOW TIME COMPUTATIONS - MPH CASE -...

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