Rosenberg’s goal is to produce 180 PDAs per hour.

Rosenberg’s goal is to produce 180 PDAs per hour.

Details:

Complete problems 9.11, 9.13, and 9.15 in the textbook.

Submit one Excel file. Put each problem result on a separate sheet in your file.

You are not required to submit this assignment to Turnitin, unless otherwise directed by your instructor. If so directed, refer to the Student Success Center for directions. Only Word documents can be submitted to Turnitin.

9.11 Stanford Rosenberg Computing wants to establish an assembly line for producing a new product, the Personal Digital Assistant (PDA).

The tasks, task times, and immediate predecessors for the tasks are as follows:

TASK TIME (sec)

IMMEDIATE

PREDECESSORS

A 12 —

B 15 A

C 8 A

D 5 B, C

E 20 D

Rosenberg’s goal is to produce 180 PDAs per hour.

1. a) What is the cycle time?
2. b) What is the theoretical minimum for the number of workstations that Rosenberg can achieve in this assembly line?
3. c) Can the theoretical minimum actually be reached when workstations are assigned?

9.13 Sue Helms Appliances wants to establish an assembly line to manufacture its new product, the Micro Popcorn Popper. The goal is to produce five poppers per hour.

The tasks, task times, and immediate predecessors for producing one Micro Popcorn Popper are as follows:

TASK

TIME

(min)

IMMEDIATE

PREDECESSORS

A 10 —

B 12 A

C 8 A, B

D 6 B, C

E 6 C

F 6 D, E

1. a) What is the theoretical minimum for the smallest number of workstations that Helms can achieve in this assembly line?
2. b) Graph the assembly line and assign workers to workstations. Can you assign them with the theoretical minimum?
3. c) What is the efficiency of your assignment?

9.15 The following table details the tasks required for Indiana-based Frank Pianki Industries to manufacture a fully portable industrial vacuum cleaner. The times in the table are in minutes. Demand forecasts indicate a need to operate with a cycle time of 10 minutes.

ACTIVITY DESCRIPTION

IMMEDIATE

PREDECESSORS TIME

A Attach wheels to tub — 5

B Attach motor to lid — 1.5

C Attach battery pack B 3

D Attach safety cutoff C 4

E Attach filters B 3

F Attach lid to tub A, E 2

G Assemble attachments — 3

H Function test D, F, G 3.5

I Final inspection H 2

J Packing I 2

1. a) Draw the appropriate precedence diagram for this production line.
2. b) Assign tasks to workstations and determine how much idle time is present each cycle.
3. c) Discuss how this balance could be improved to 100%.
4. d) What is the theoretical minimum number of workstations

 

Details:

Complete Problems 10.25, 10.29, E.3, E.5, and E.6 in the textbook.

Submit one Excel file. Put each problem result on a separate sheet in your file.

You are not required to submit this assignment to Turnitin, unless otherwise directed by your instructor. If so directed, refer to the Student Success Center for directions. Only Word documents can be submitted to Turnitin.

10.25 Peter Rourke, a loan processor at Wentworth Bank, has been timed performing four work elements, with the results shown in the following table. The allowances for tasks such as this are personal, 7%; fatigue, 10%; and delay, 3%.

TASK

ELEMENT

PERFORMANCE

RATING (%)

OBSERVATIONS (MINUTES)

1 2 3 4 5

1 110 .5 .4 .6 .4 .4

2 95 .6 .8 .7 .6 .7

3 90 .6 .4 .7 .5 .5

4 85 1.5 1.8 2.0 1.7 1.5

1. a) What is the normal time?
2. b) What is the standard time?

10.29. The Dubuque Cement Company packs 80-pound bags of concrete mix. Time-study data for the filling activity are shown in the following table. Because of the high physical demands of the job, the company’s policy is a 23% allowance for workers.

1. a) Compute the standard time for the bag-packing task.
2. b) How many observations are necessary for 99% confidence, within {5% accuracy?

ELEMENT

OBSERVATIONS (SECONDS) PERFORMANCE

1 2 3 4 5 RATING (%)

Grasp and place bag 8 9 8 11 7 110

Fill bag 36 41 39 35 112a 85

Seal bag 15 17 13 20 18 105

Place bag on conveyor 8 6 9 30b 35b 90

(A) Bag breaks open; included as delay in the allowance factor.

(B) Conveyor jams; included as delay in the allowance factor

ADDITIONAL INSTRUCTIONS FOR THE CLASS

Discussion Questions (DQ)

Initial responses to the DQ should address all components of the questions asked, include a minimum of one scholarly source, and be at least 250 words.

Successful responses are substantive (i.e., add something new to the discussion, engage others in the discussion, well-developed idea) and include at least one scholarly source.

One or two sentence responses, simple statements of agreement or “good post,” and responses that are off-topic will not count as substantive. Substantive responses should be at least 150 words.

I encourage you to incorporate the readings from the week (as applicable) into your responses.

Weekly Participation

Your initial responses to the mandatory DQ do not count toward participation and are graded separately.

In addition to the DQ responses, you must post at least one reply to peers (or me) on three separate days, for a total of three replies.

Participation posts do not require a scholarly source/citation (unless you cite someone else’s work).

Part of your weekly participation includes viewing the weekly announcement and attesting to watching it in the comments. These announcements are made to ensure you understand everything that is due during the week.

APA Format and Writing Quality

Familiarize yourself with APA format and practice using it correctly. It is used for most writing assignments for your degree. Visit the Writing Center in the Student Success Center, under the Resources tab in LoudCloud for APA paper templates, citation examples, tips, etc. Points will be deducted for poor use of APA format or absence of APA format (if required).

Cite all sources of information! When in doubt, cite the source. Paraphrasing also requires a citation.

I highly recommend using the APA Publication Manual, 6th edition.

Use of Direct Quotes

I discourage overutilization of direct quotes in DQs and assignments at the Masters’ level and deduct points accordingly.

As Masters’ level students, it is important that you be able to critically analyze and interpret information from journal articles and other resources. Simply restating someone else’s words does not demonstrate an understanding of the content or critical analysis of the content.

It is best to paraphrase content and cite your source.

For assignments that need to be submitted to LopesWrite, please be sure you have received your report and Similarity Index (SI) percentage BEFORE you do a “final submit” to me.

Once you have received your report, please review it. This report will show you grammatical, punctuation, and spelling errors that can easily be fixed. Take the extra few minutes to review instead of getting counted off for these mistakes.

Review your similarities. Did you forget to cite something? Did you not paraphrase well enough? Is your paper made up of someone else’s thoughts more than your own?

Visit the Writing Center in the Student Success Center, under the Resources tab in LoudCloud for tips on improving your paper and SI score.

Late Policy

The university’s policy on late assignments is 10% penalty PER DAY LATE. This also applies to late DQ replies.

Please communicate with me if you anticipate having to submit an assignment late. I am happy to be flexible, with advance notice. We may be able to work out an extension based on extenuating circumstances.

If you do not communicate with me before submitting an assignment late, the GCU late policy will be in effect.

I do not accept assignments that are two or more weeks late unless we have worked out an extension.

As per policy, no assignments are accepted after the last day of class. Any assignment submitted after midnight on the last day of class will not be accepted for grading.

Communication

Communication is so very important. There are multiple ways to communicate with me:

Questions to Instructor Forum: This is a great place to ask course content or assignment questions. If you have a question, there is a good chance one of your peers does as well. This is a public forum for the class.

Individual Forum: This is a private forum to ask me questions or send me messages. This will be checked at least once every 24 hours.