Question

The following jobs are waiting to be processed at Rick? Solano's machine center.? Solano's machine center has a relatively long backlog and sets a fresh schedule every 2? weeks, which does not disturb earlier schedules. Below are the jobs to be scheduled? today, which is day 241 ?(day 241 is a work? day). Job names refer to names of clients and contract numbers. Compute all times based on initiating work on day 241.

(Job) (Date Job Received) (Due Date Duration (days))

BR-02 225 270 25

CX-01 230 320 35

DE-06 235 360 40

RG-05 231 310 30

SY-11 228 300 15

Using the LPT? (longest processing? time) decision rule for sequencing the? jobs, the order is? (to resolve a? tie, use the order in which the jobs were? received):

The average tardiness? (job lateness) for the sequence developed using the LPT rule? =

The percentage utilization for the sequence developed using the LPT rule? =

The average completion time for the sequence developed using the LPT rule? =

The average number of jobs in the system for the sequence developed using the LPT rule? =

Critical Ratio? (CR) for each job is given by the? relationship:= (Due Date-Date Today) / (Processing Time). what is CR for jobs a-e

.

Using the Critical Ratio? (CR) scheduling rule for sequencing the? jobs, the order? is:

.

Answer #1

Scheduling as per LPT rule -

Job | Date received |
Process time |
Due date | Order | Flow time | End time | Lateness |

DE-06 | 235 | 40 | 360 | 1 | 40 | 280 | 0 |

CX-01 | 230 | 35 | 320 | 2 | 75 | 315 | 0 |

RG-05 | 231 | 30 | 310 | 3 | 105 | 345 | 35 |

BR-02 | 225 | 25 | 270 | 4 | 130 | 370 | 100 |

SY-11 | 228 | 15 | 300 | 5 | 145 | 385 | 85 |

TOTAL | 145 | 495 | 1695 | 220 | |||

AVERAGE | 99 | 339 | 44 |

Average tardiness = 44

Utilization = 145/495 = 29.29%

Average completion time = 339

Average jobs in the system = 495/145 = 3.41

Scheduling as per the Critical Ratio -

Job | Date received |
Process time |
Due date | Critical ratio |
Order |

BR-02 | 225 | 25 | 270 | 1.16 | 1 |

CX-01 | 230 | 35 | 320 | 2.26 | 2 |

RG-05 | 231 | 30 | 310 | 2.30 | 3 |

DE-06 | 235 | 40 | 360 | 2.98 | 4 |

SY-11 | 228 | 15 | 300 | 3.93 | 5 |

The following jobs are waiting to be processed at Rick? Solano's
machine center.? Solano's machine center has a relatively long
backlog and sets a fresh schedule every 2? weeks, which does not
disturb earlier schedules. Below are the jobs to be scheduled?
today, which is day 241 ?(day 241 is a work? day). Job names refer
to names of clients and contract numbers. Compute all times based
on initiating work on day 241.
(Job) (Date Job Received) (Due Date Duration...

The following jobs are waiting to be processed at Rick? Solano's
machine center.? Solano's machine center has a relatively long
backlog and sets a fresh schedule every 2? weeks, which does not
disturb earlier schedules. Below are the jobs to be scheduled?
today, which is day 241 ?(day 241 is a work? day). Job names refer
to names of clients and contract numbers. Compute all times based
on initiating work on day 241.
(Job) (Date Job Received) (Due Date Duration...

Use Johnson's rule to determine the optimal sequencing for the
five jobs to be processed on two machines in a fixed order (Machine
1 before Machine 2). The processing times are given in the table
below.
Job
Machine 1
Machine 2
L
10
2
M
5
4
N
7
5
O
3
6
P
1
7
** Please show excel steps so i can see if I did this
right** thanks
What is the optimal sequence?
What is the total...

Part 3. Questions 3,4,5. [ Use Video-2 under
Scheduling heading. ]
[Note: The order of jobs in a schedule ABCDE is
1st,2nd,3rd,4th,5th,
respectively.]
Five jobs arrived to be processed with the processing times and
due dates.
Present Date=
300
Work Order
A
B
C
D
E
Processing Times (Days)
14
5
40
12
7
Due Date
167
163
195
191
161
. . .
Question 3. The FIFO schedule is “ABCDE” (where job “A” is the
first job) and the...

Five jobs are ready for processing at time zero through a
workstation. The details of the processing time and the due date of
completion is provided in the following table.
Job
Processing Time
(days)
Due Date
A
5
11
B
6
16
C
3
19
D
4
10
E
2
9
Using the earliest due
date (EDD) rule, the average lateness for the five jobs is:

Today is Nov. 16. The following jobs need to be scheduled on the
same machine.
Job A, Process time =14 days, and due date November 26
Job B, Process time= 11 days, and due date = November 25
Job C, Process time =7 days, and due date= December 14
Job D, Process time=6 days, and due date= November 29
Job E, Process time= 2 days, and due date= November 20
Schedule the jobs according to SPT. What are the average...

A Northern British Columbia lumberyard has four jobs on order,
as shown in the following table. Today is day 205 on the yard’s
schedule.
Job
Due Date
Remaining Time (Days)
A
212
6
B
209
3
C
214
10
D
210
8
In what sequence would the jobs be ranked according to the
following decision rules:
a) FCFS
b) SPT
c) LPT
d) EDD
e) Critical ratio
Which is best and why? Which has the minimum lateness?

The owner/operator of the local franchise of Handyman, Inc. has
4 jobs to complete today, shown in the order in which they were
received.
Job
Processing Time (hrs)
Due (hrs from now)
W
4
4
X
3
5
Y
2
2
Z
1
1
If he or she uses the earliest due date first priority rule to
schedule these jobs, what will be the average tardiness?

You have the following information on four jobs. Today is the
beginning of day 1, so you can assume that the Time needed = work
remaining and Due (days) = time remaining.
Job
Time Needed
(days)
Due (days)
P
8
8
Q
10
23
R
3
17
S
6
30
T
4
29
U
7
24
1. If you order these jobs by Shortest Process Time rule, the
order will be:
2. If you order these jobs by Earliest Due...

Five jobs are waiting for processing through two work centers.
Their processing time (in minutes) at each work center is contained
in the table below. Each job requires work center Alpha before work
center Beta. According to Johnson's rule,
a. what is the job processing sequence?
b. how much idle time does work center Beta have?
Job
Alpha
Beta
R
20
10
S
25
35
T
50
20
U
15
35
V
55
75

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