# Precision Manufacturing

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Precision Manufacturing
ME290

Homework 1.

Homework #1

Prof. Omar Romero-Hernandez / GSI Katie McKinstry

space. You must also show your calculations. This homework is due on Thursday Sep 27th, between 11.00am and 11.10pm in the classroom. Late submission is not accepted.

Make sure you refer to the ME290 syllabus

for more rules related to homework:

Homework: Homework will be assigned in lecture and will be due as indicated on each homework (usually one week later). Please do plan in advance since no questions concerning the homework problems, projects, exams, presentations etc. will be accepted 24 hrs prior to the corresponding deadline. Late homework will not be accepted. You must turn in all problems together (i.e. you can’t turn in some on time and others late). Make sure that procedure and reasoning behind your answer is included.
Problem 1. (exercise 3.4)
A hospital emergency room (ER) is currently organized so that all patients register through an initial check-in process. At his or her turn, each patient is seen by a d octor and then exits the process, either with a presentation or with admission to the hospital. Currently, 55 people per hour arrive at ER, 10% of who are admitted to the hospital. On average, 7 people are waiting to be registered and 34 are registered and waiting to see a doctor.
The registration process takes, on average, 2 minutes per patient. Among patients who receive prescriptions, average time spent with a doctor is 5 minutes. Among those admitted to the hospital, average time is 30 minutes. (a) On average, how long does a patient spend in the ER? (b) On average, how many patients are being examined by doctors? (c) On average, how many patients are there in the ER? Assume the process to be stable; that is, average inflow rate equals average outflow rate.
Problem 2 (exercise 3.5)
A triage system has been proposed for the ER described

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