hw4-sol - ISyE 4803 Homework 4 Solutions Due November 3...

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ISyE 4803 – Homework 4 Solutions Due: November 3, 2009 (21 Points) NOTE: In answering these questions, do not copy-paste text from the articles. Use your own words. 1. (4 points) Answer the following questions based on the presentation “Building A Smarter Healthcare System”: a. (2 points) List 3 IE tools that the healthcare system may use for improving the current system. Give an example of the application of each tool. Answers may vary. One possible answer could be the following: 1) Simulation that enables the system analysis for different scenarios. Example: Study of doctors needed during each hour and each doctor working time assignment. 2) Control charts to track whether the current state of a variable is within the predetermined safety limits. Example: blood pressure tracking of hypertension patients. 3) Lean methodologies try to reduce possible resource waste. Example: purchasing of perishable drugs. b. (2 points) The presentation shows the use of 3 IE tools to solve the “Urgent Care Patient Forecasting and Staffing Optimization” case. To which of these 3 tools result, the system outputs are more sensitive? Explain. The system outputs are more sensitive to the results of the patients forecasting. Because the other two tools, optimization and simulation, use the patient forecasting result as an input. If the forecast is not accurate, the results from optimization and simulation are not showing the current situation. Thus it is hard to have good advices to improve the current state.
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2. (7 points) Answer the following questions based on the presentation “Optimization in Intensity Modulated Radiation Therapy (IMRT)” : a. (5 points) Following the notations of the presentation, please formulate the optimization problem with the objective to minimize the dose received by the critical voxels. Please write down the objective function and all the
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hw4-sol - ISyE 4803 Homework 4 Solutions Due November 3...

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