Homework Answers
As per HOMEWORKLIB POLICY and guideline, the first unrelated question is answered below:
3.
PFD allowance is the grace time that may be required for a job or work if making an unavoidable delay.
The percentage should be charged on the normal time in order to get such grace time.
Normal time = 3.0 minute
Grace time = Normal time × PFE allowance
= 3.0 × 15%
= 0.45 minute
a.
Standard time = Normal time + Grace time
= 3.0 + 0.45
= 3.45 minute per piece
b.
There are 8 hours, means (8 × 60 =) 480 minutes
Required units = 480 minutes / Standard minutes per piece
= 480 / 3.45
= 139.130435
= 139 rounded to whole number
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A: Find the Normal Time for the "Prepare Daily Reports" operation: B: Normal Time for "Photocopy ...
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E: Normal Time for the ENTIRE OPERATION PROCESS
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Based on a careful work study in the Hofstetter Corp., the...
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(20 points) A direct time study is performed to obtain average time and performance rating values for the work elements in a certain repetitive task. The values are given in the table below. Elements a, b, and c are worker-controlled. Element d is a machine-controlled element and its time is the same each cycle (N.A.means performance rating is not applicable). Element c is performed while the machine is performing its cycle (element d). Element e is a worker- controlled irregular...
A worker-machine operation was found to involve 40 minutes of machine time per cycle in the course of 40 cycles of stopwatch study The worker's time averaged 25 minutes per cycle, and the worker was given a rating of 115 percent machine rating is 100 percent). Midway through the study, the worker took a 10-minute rest break. Assuming an allowance factor of 15 percent of work time which is applied only to the worker element not the machine element), determine...
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The work shift at the ABC Company runs fr lunch from 11:30 to 12:15 p.m. that does not count as part of the work shift (workers are not paid for this time). The company provides two 12-minute rest breaks during working hours (paid time), one in the morning and one in the afternoon. The com m. to 4:15 p.m. with a 45 minute break for pany also allows 25 minute day for personal needs (paid time). In addition, a work...
Problem 2: A company wishes to assign multiple machines to an operator to minimize costs The following times have been collected: Loading machine standard time 034 min Unloading machine standard time Walk time between machines Operator rate Machine rate Power feed time (machining time) 0.26 min 0.09 min $15.00/h S22.00/h 1.56 min - 1. 2. 3. 4. 5. Determine the optimal number of machines per operator to minimize unit cost. Create a worker-machine chart. (Suggestion: use Excel or insert a...
3.2 The observed element times and performance ratings collected in a direct time study are indicated in the table below. The snapback timing method was used. The PFD allowance in the plant is 14%. All elements are regular elements in the work cycle. Determine (a) the normal time and (b) the standard time for the cycle Work element Observed time (min) Performance rating(%) 0.22 90 0.41 120 0.30 100 0.37 90
A: Find the Normal Time for the "Prepare Daily Reports"
operation:
B: Normal Time for "Photocopy Results" Operation:
C: Normal TIme for the "Label and Package Reports Operation:
D: Normal Time for "Distribution Reports" Operation:
E: Normal Time for the ENTIRE OPERATION PROCESS
F: The Standard Time for this Process:
G: The number of Operations that are required for a 90, 95, and
99% confidence level with 5% accuracy?
Based on a careful work study in the Hofstetter Corp., the...
A rider lawn mower is produced on a manual assembly line. Work content time=49.5 min. The line has 25 workstations with a manning level = 1.2. Available shift time per day = 8 hr, but equipment downtime during the shift reduces actual production time to 7.5 hr on average. This results in an average daily production of 244 units/day. Repositioning time per worker = 5% of cycle time. Determine (a) line efficiency, (b) balancing efficiency, and (c) repositioning time.
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