EIND 313 UNH Lab 5 Time Studies Technical Summary please read the lab handout and do the technical report only i will upload the lab handout and book chapt

EIND 313 UNH Lab 5 Time Studies Technical Summary please read the lab handout and do the technical report only i will upload the lab handout and book chapter on time study EIND 313 Laboratory #5 Demonstration +
Study – Introduction to Time Studies
Time Study Equipment
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Stopwatch
o Decimal Minute Watch (Meylan Stopwatch Co, Models 204 &
208)
? Large Dial 1 division = 0.01 min, 100 divisions = 1.0
min
? Small Dial 30 divisions = 1.0 min
? Best for continuous time study method
o Digital Stopwatch (Accusplit AX 725)
? 0.01 sec divisions
? typical accuracy of +/- 0.002%
? continuous or snapback time study methods
Time study board (clipboard with various features/add-ons)
Time study forms (many exist – use provided form)
Calculator
Hand-held PC/Tablet/PDA with time study software (optional, many
exist)
Video recorder (optional)
Metronome (optional, many phone apps exist)
Procedure (items to be annotated in your lab log/notebook)
1. Understanding performance Rating (Metronome Use)
Standard pace can be defined as the effective rate of performance of a
conscientious, self-paced, qualified employee when working neither fast nor slow and giving due
consideration to physical, mental or visual requirements of the specific job. The instructor (or operator) can
synchronize the work pace with the metronome so as to demonstrate a particular level of performance.
Grave is extremely slow and solemn at 20 to 40 beats per minute. Playing or listening to a song at this
pace can be difficult, as the pulse of the song is literally about every two seconds.
Largo 40 – 50 bpm.
Adagio 51 – 60 bpm and literally means ‘at ease.’
Andante 61-80 bpm is meant to be at walking pace.
Moderato 81-90 bpm.
Allegretto is moderately quick at 91 to 104 bpm.
Allegro 105-132 bpm, is a very commonly-used tempo, partly because of its happy, quick pace and
partly because the range of BPM is so large: its range is from 105 to 132 beats per minute.
Many commercials will use this tempo because it is slightly higher than the average heart
rate and therefore gives a sense of excitement.
Vivace livens the pace at 132 – 167 bpm.
Presto imitates a sprinter’s heart at a quick 168 – 177 bpm.
Prestissimo is extremely fast 178 –208 bpm.
a. In groups of 3-4 students deal cards at paces of (comment = what did the pace “feel” like):
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40 bpm; 1 brief comment: _________________________________________________________
60 bpm; 1 brief comment: _________________________________________________________
80 bpm; 1 brief comment: _________________________________________________________
90 bpm; 1 brief comment: _________________________________________________________
104 bpm; 1 brief comment: ________________________________________________________
150 bpm; 1 brief comment: ________________________________________________________
170 bpm; 1 brief comment: ________________________________________________________
190 bpm; 1 brief comment: ________________________________________________________
b. To demonstrate various levels of performance to a group of union stewards, the time study supervisor of
the Attainment Company is using the metronome while dealing card hands. Assume level of performance
for 100% is 104 bpm. How many times per minute should the metronome beat to demonstrate the
following levels of performance: 60 percent, 75 percent, 100 percent, 125 percent?
i.
ii.
iii.
iv.
60 percent = 0.60 × 104 beats =
75 percent = 0.75 × 104 beats =
100 percent = ____ × ___ beats =
125 percent = ____ × ___ beats =
62 beats/min
___ beats/min
___ beats/min
___ beats/min
c. Rate the overall study for each of the following jobs shown by the instructor via video:
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ii.
iii.
iv.
Stamping extrusions
Stamping end couplings
Flashlight assembly
Union assembly
=> Level of Performance ______
=> Level of Performance ______
=> Level of Performance ______
=> Level of Performance ______
**check your answers with TA/instructor before moving on.
2. Understating Time Studies
(use your textbook and other resources to answer these questions)
a. Operators and their Responsibilities During a Time Study
• Select an operator who has a record of performing at standard pace or somewhat above standard
pace, who is cooperative, dependable and conscientious. The operator should have a favorable
attitude to the work measurement procedure and should have an open mind in connection with
method improvement.
• A qualified operator is one who can achieve the established standard of performance when
following the prescribed method at an average pace.
• The operator should be rated in order to adjust the time of a good operator up to the standard and
the time of a poor operator down to the standard.
b. Analyst Responsibilities During a Time Study
Summarize 3 key responsibilities 1-2 sentences each:
• Responsibility 1:
• Responsibility 2:
• Responsibility 3:
c. Supervisor and Union’s Responsibilities
Summarize 3 key responsibilities 1-2 sentences each:
• Responsibility 1:
• Responsibility 2:
• Responsibility 3:
d. Time Study Script
Write a short script and practice twice for how you will approach an operator and discuss your time
study. How can you quickly convey information and develop rapport with an operator?
**conduct script with instructor/TA (acting as an operator) for approval before moving on.
3. Time Study Practice Part 1
Find the observed, normal, and standard times for the following jobs shown on the website. Assume
standard performance and a 10 percent allowance.
a) Stamping extrusions
b) Stamping end couplings
c) Flashlight assembly
d) Union assembly
Job | Time
Stamping
Extrusions
Stamping End
Couplings
Flashlight
Assembly
Union
Assembly
Observed Time
Normal Time
Standard time
**check your answers with TA/instructor before moving on.
4. Time Study Practice Part 2
Use the flashlight video to complete the following tasks. Use the Therblig Handout to assist you. The
following forms need to be completed:
a.
b.
c.
d.
e.
CTD Risk Index Analysis – assume a grip force of 15% MVC
Two-Hand Process Chart (might need one or two iterations to establish)
Therbligs Analysis Checklist (to guide establishment of method)
Fundamental motions used for flashlight assembly
Time Study Observation Form (due this last, once your method is established) – 3 cycles,
assume 110% overall performance rating, and 10% allowance.
Technical Summary
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Attainment Company has contracted your firm to complete the following tasks and to submit a
formatted 2-3 page executive summary of your results combining your interpretations and results from
the flashlight assembly video from lab 2 (flow process, etc) to your analysis in Lab 5.
a. Focus your discussion primarily on the current analyses within lab 5 but do not discount what
you learned about the flashlight assembly in lab 2 to extend and enrich your discussion
particularly with respect to CTDs.
b. Discuss direct time study method.
c. Discuss performance rating method did you use the speed method? Was this adequate?
d. Discuss fixed allowance of 10% – adequate or not adequate? What would you modify for the
allowance?
e. What did you learn including challenges/difficulties, best practices, how you will conduct your
next study differently.
f. Propose how will you conduct the next analyses of the flashlight using predetermined time
systems.
g. Attach additional forms/documentation (you can use DesignTools!) to your summary.
h. 5 external references must be included and properly cited.
i. No lab log/notebook pages required.
Fundamental Motions used in Inserting Flashlight Assembly
Motion Illustration/Picture/Graphic
Name and Description of Motion
Symbol
THERBLIG ANALYSIS CHECKLIST
Reach and Move
Yes No
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8.
Can either of these therbligs be eliminated?
Can distances be shortened to advantage?
Are the best means (conveyors, tongs, tweezers) being used?
Is the correct body member (fingers, wrist, forearm, shoulder) being used?
Can a gravity chute be employed?
Can transports be effected through mechanization and foot-operated devices?
Will time be reduced by transporting in larger units?
Is time increased because of the nature of the material being moved or because of a
subsequent delicate positioning?
9. Can abrupt changes in direction be eliminated?
Grasp
Would it be advisable for the operator to grasp more than one part or object at a time?
Can a contact grasp be used rather than a pickup grasp?
In other words, can objects be slid instead of carried?
Will a lip on the front of bins simplify grasping small parts?
Can tools or parts be pre-positioned for easy grasp?
Can a vacuum, magnet, rubber fingertip, or other device be used to advantage?
Can a conveyor be used?
Has the jig been designed so that operators may grasp the part easily when removing it?
Can the previous operator pre-position the tool or the work, simplifying grasp for the
next operator?
10. Can tools be pre-positioned on a swinging bracket?
11. Can the work table surface be covered with a layer of sponge material so that the fingers
can enclose small parts more easily?
Release
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Yes No
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2.
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4.
Can the release be made in transit?
Can a mechanical ejector be used?
Are the bins that contain the part after its release the proper size and design?
At the end of the therblig release, are the hands in the most advantageous position for the next
therblig?
5. Can multiple units be released?
Pre-Position
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Yes No
1. Can a holding device at the workstation keep tools in the proper positions and the
handles in upright positions?
2. Can tools be suspended?
3. Can a guide be used?
4. Can a magazine feed be used?
5. Can a stacking device be used?
6. Can a rotating fixture be used?
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Yes No
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Use
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Yes No
Can a jig or fixture be used?
Does the activity justify mechanized or automated equipment?
Would it be practical to make the assembly in multiple units?
Can a more efficient tool be used?
Can stops be used?
Is the tool being operated at the most efficient feeds and speeds?
Should a power tool be employed?
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Therblig Analysis Checklist – Page 1 of 2
Search
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6.
Yes No
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Are articles properly identified?
Perhaps labels or color could be utilized?
Can transparent containers be used?
Will a better layout of the workstation eliminate searching?
Is proper lighting being used?
Can tools and parts be pre-positioned?
Select
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4.
Yes No
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Are common parts interchangeable?
Can tools be standardized?
Are parts and materials stored in the same bin?
Can parts be pre-positioned in a rack or tray?
Position
Inspect
Can inspection be eliminated or combined with another operation or therblig?
Can multiple gages or tests be used?
Will inspection time be reduced by increasing the illumination?
Are the articles being inspected at the correct distance from the worker’s eyes?
Will a grazing light accentuate defects and facilitate inspection?
Would an electric eye be useful?
Does the volume justify automatic electronic inspection?
Would a magnifying glass facilitate the inspection of small parts?
Is the best inspection method being used?
Has consideration been given to polarized light, template gages, sound tests, performance
tests, and so on?
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Yes No
Is the best order-of-muscles classification being used?
Are temperature, humidity, ventilation, noise, light, and other working conditions satisfactory?
Are benches of the proper height?
Can the operator alternately sit and stand while performing work?
Does the operator have a comfortable chair of the right height?
Are mechanical means being used for heavy loads?
Is the operator aware of his or her average intake requirements in calories per day?
Hold
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Yes No
Rest to Overcome Fatigue
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Yes No
1. Can such devices as a guide, funnel, bushing, stop, swinging bracket, locating pin, recess, key,
pilot, or chamfer be used?
2. Can tolerances be changed?
3. Can the hole be counterbored or countersunk?
4. Can a template be used?
5. Can the elimination of burrs decrease the problem of positioning?
6. Can the article be pointed to act as a pilot?
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Yes No
Can a mechanical jig, such as a vise, pin, hook, rack, clip, or vacuum, be used?
Can friction be used?
Can a magnetic device be used?
Should a twin holding fixture be used?
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Therblig Analysis Checklist – Page 2 of 2

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