Process Flow Analysis Problem Set 1 At its busiest time of t

Process Flow Analysis Problem Set

1. At its busiest time of the day two people per second step onto an escalator. The escalator takes 30 seconds to bring a person from the bottom to the top. How many people are on the escalator during the busiest time of the day?

2. A shipping company operates 10 container ships that can each carry 5,000 containers on each journey between ports. They want to be able to load and unload 20,000 containers each week. Assume their ships always travel fully loaded. What is the longest average travel time between ports that allows them to meet their foal of 20,000 containers per week? (Hint: the flow unit is a container)

3. The following table shows the time stamps of 8 callers who phoned from 8:00am to 8:20 am to a reservation desk.

Caller

Time In

Time Out

1

8:01

8:05

2

8:02

8:07

3

8:06

8:08

4

8:09

8:12

5

8:10

8:15

6

8:12

8:20

7

8:16

8:19

8

8:17

8:19

a. Based on the data provided, what is the throughput rate of callers from 8:00am to 8:20am? (State your answer in number of callers on average per minute)

b. Based on the data provided, what is the average flow time (in minutes) for callers from 8am to 8:20 am?  

Solution

60 seconds   for one Minute,and 60 minutes it leads1 hours= 60 minutes * 60 seconds=3,600 seconds

one hour =3600 seconds

8 hour =3,600 seconds

=28,800 seconds

Busy hours is considered as 8 hours and two people per second

=28,800 seconds *2

=57,600people

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