Homework Answers
Answer (a)
Normal time = observed time * performance rating
Hence, Normal time = [first observed time * performance rating for all cycles] + [observed cycle post eight cycles * performance rating post eight cycles]
= [4.8 * (0.90)] + [2.0 * (1.20)/8 ] = 4.32 + 0.3 = 4.62 min
Answer (b)
Standard time = Normal time * (1+ Allowance factor)
Standard time = 4.62 * ( 1+ 0.15) = 5.313 min
Answer (c)
Standard hours = 123 * (5.313) = 653.499 min = 653. 499 / 60 hours = 10.89165 hours
Worker efficiency = 10.89165 / 8.0 = 1.36145625 = app. 136.15%
Add Answer to:
1. (18 points) the standard time is to be established study. The observed time for the...
(10 points) The normal time for a repetit h atduces two work per ce min. The...
(10 points) The normal time for a repetit h atduces two work per ce min. The plant uses a PFD allowance factor of 15 Determine the standard meet and (b) how many work units are produced in an hour tandard performance 4. (10 points) The normal time of the work cycle in a worker-machine system is 5.50 min. The operator-controlled portion of the cycle is 0.70 min. One work unit is produced each cycle. The machine cycle time is constant....
(20 points) A direct time study is performed to obtain average time and performance rating values...
(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...
3.2 The observed element times and performance ratings collected in a direct time study are indicated...
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 worker-machine operation was found to involve 40 minutes of machine time per cycle in the...
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...
A worker-machine operation was found to involve 3.6 minutes of machine time per cycle in the...
A worker-machine operation was found to involve 3.6 minutes of machine time per cycle in the course of 40 cycles of stopwatch study. The worker’s time averaged 2.1 minutes per cycle, and the worker was given a rating of 111 percent (machine rating is 100 percent). Midway through the study, the worker took a 10-minute rest break. Assuming an allowance factor of 11 percent of work time which is applied only to the worker element (not the machine element), determine...
In a time study of a manufacturing operation, 15 actual times were recorded for the duration...
In a time study of a manufacturing operation, 15 actual times were recorded for the duration of producing a product for a skilled worker who has an experience of 10 years and for an unskilled worker who started to work one months ago: For the skilled worker, the average time observed to complete a product was 12 minutes. The performance rating applied to the observed worker was 1.10 and the allowance during a 10-hour shift was 30% or 180 minutes....
What is a Therblig? Please specify and give exampie. 3) A time study was conducted on a job that ...
What is a Therblig? Please specify and give exampie. 3) A time study was conducted on a job that contains four elements. The observed times and performance ratings for six cycles are shown in the following table. Note that all units are in minutes 15 Element Performance 1 13 4 6 rating 85% 100% 110% 95% 0.5 258* 0.89 1.14 0.46 1.52 0.8 0.44 1.5 0.84 1.1 0.43 1.47 0.48 1.49 0.85 0.45 1.51 0.83 1.081.21.161.26 4 * Machine broke...
9. A new product is to be assembled on a 100% manual assembly line. The line is designed to produce 120,000 units/yr. Work content time for the product is 39.5 min. The assembly line will operate...
9. A new product is to be assembled on a 100% manual assembly line. The line is designed to produce 120,000 units/yr. Work content time for the product is 39.5 min. The assembly line will operate 50 wklyr, 5 shifts/wk, 8 hr/shift. Expected line efficiency is 96%. There will be one worker per station. Determine (a) average hourly production rate, (b) cycle time, and (c) ideal minimum number of workstations.(6 pts)
9. A new product is to be assembled on...
A rider lawn mower is produced on a manual assembly line. Work content time=49.5 min. 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.
A time study analysis shows an assembly operation for 50 cycles with an average cycle time of 15.00 minutes. If you ass...
A time study analysis shows an assembly operation for 50 cycles with an average cycle time of 15.00 minutes. If you assigned a performance rating of .95 and a work-day allowance factor of 20 percent, answer the following question: What is the Observed Time?
(10 points) The normal time for a repetit h atduces two work per ce min. The plant uses a PFD allowance factor of 15 Determine the standard meet and (b) how many work units are produced in an hour tandard performance 4. (10 points) The normal time of the work cycle in a worker-machine system is 5.50 min. The operator-controlled portion of the cycle is 0.70 min. One work unit is produced each cycle. The machine cycle time is constant....
(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...
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 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...
What is a Therblig? Please specify and give exampie. 3) A time study was conducted on a job that contains four elements. The observed times and performance ratings for six cycles are shown in the following table. Note that all units are in minutes 15 Element Performance 1 13 4 6 rating 85% 100% 110% 95% 0.5 258* 0.89 1.14 0.46 1.52 0.8 0.44 1.5 0.84 1.1 0.43 1.47 0.48 1.49 0.85 0.45 1.51 0.83 1.081.21.161.26 4 * Machine broke...
9. A new product is to be assembled on a 100% manual assembly line. The line is designed to produce 120,000 units/yr. Work content time for the product is 39.5 min. The assembly line will operate 50 wklyr, 5 shifts/wk, 8 hr/shift. Expected line efficiency is 96%. There will be one worker per station. Determine (a) average hourly production rate, (b) cycle time, and (c) ideal minimum number of workstations.(6 pts)
9. A new product is to be assembled on...
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.
Most questions answered within 3 hours.
-
CASE STUDY
The phrase ‘OK Boomer’ has gone viral recently as a way to
shut down...
asked 11 minutes ago -
The following thermochemical equation is for the reaction of
nitrogen(g) with oxygen(g) to form nitrogen dioxide(g)....
asked 7 minutes ago -
the solubility of an unknown salt M3Z2 at 25 degrees is
4.9*10^-7 mol/L. what is the...
asked 8 minutes ago -
We would like to create an Assembly program whose executable is
called division.exe and that behaves...
asked 9 minutes ago -
Consider a simple paging system with the following parameters:
232 bytes of physical memory; page size...
asked 10 minutes ago -
a raindrop of mass 2.00 g falls on the roof of a car with an
initial...
asked 33 minutes ago -
An environmental economic consulting firm is hired to measure
the negative externalities associated with the pollution...
asked 33 minutes ago -
Express Catering contributed $8,000 to the American Lung
Association. If taxable income, before charitable contribution is...
asked 25 minutes ago -
Why we should not allow the Oil & Gas industry to
explore, exploit and extract oil...
asked 36 minutes ago -
In the readings for this topic, the methods for gathering data are
provided. However, there is...
asked 48 minutes ago -
Select from the option list provided the most likely
classification(s) of net assets, if any, that...
asked 48 minutes ago -
Ivanhoe Corp. management is expecting a project to generate
after-tax income of $76,940 in each of...
asked 50 minutes ago