Question 1

For a work-sampling study, there is a 95 percent probability that the processing time of an activity has an error of less than 0.06 minutes. The best estimate we have for "p" is 0.30. Determine the sample size needed for a work-sampling study if no estimate of "p" is available.

Accepted Answer

The answer of For a work-sampling study, there is a...

Question 2

The Chester Table Company mass produces quality end tables for motels. They produce 5,000 end tables per week. The owner is trying to determine how many workers he needs. The workers work 40 hours per week but are idle about three percent of the time because of the cleaning of their area. Their performance rating is equal to one. The owner has developed these time standards for operations per table:
Transporting the table through the plant = 2 minutes
Table top = 10 minutes
One leg = 4 minutes
Finishing = 5 minutes
a. How long does it take (in minutes) to produce one table?
b. What is the labor standard (in minutes) for this operation?
c. What is the minimum number of workers needed to produce 5000 tables in one week?

Accepted Answer

The answer of The Chester Table Company mass produces quality...

Question 3

Determine the sample size for the following time study given a standard deviation of four minutes and a 98 percent probability that the value of the sample mean is within 1.5 minutes?

Accepted Answer

The answer of Determine the sample size for the following...

Question 4

Consider the work sampling information below. $\text { Cycles (Actual Time in Seconds) }$
$\begin{array} { | l | l | l | l | l | l | l | } 
\hline \begin{array} { l } 
\text { Work } \
\text { Task }
\end{array} & 1 & 2 & 3 & 4 & 5 & 6 \
\hline \text { Q } & 25 & 30 & 27 & 31 & 22 & 20 \
\hline \text { R } & 40 & 52 & 35 & 42 & 47 & 38 \
\hline \text { S } & 60 & 62 & 50 & 55 & 62 & 58 \
\hline
\end{array}$ 
a. If the performance rating factor for Q = 0.80, R = 1.10, and S = 1.10 and the total allowance is 17 percent, determine the normal time for the job.
b. With the allowance of 17 percent, determine the output per hour.

Accepted Answer

The answer of Consider the work sampling information below. \(\text...

Question 5

A yacht manufacturer signed a contract to build five sailboats for a California resort. Assuming an 85 percent learning curve, how many labor-hours will it take to build all five sailboats if it took 7,000 standard hours to build the original sailboat?

Accepted Answer

The answer of A yacht manufacturer signed a contract to...

Question 6

An employee was observed over an extended period of time for a work-sampling study with the following results:
 $\begin{array}{lll}&& \text { Performance } \
\text { Activity } & \text { Percentage of Time } & \text { Rating Factor }\
\text { On the Phone } & 30 & 1.15 \
\text { Filing } & 35 & 0.70 \
\text { Face-to-Face with Customer } & 25 & 1.10 \
\text { Idle } & 10 & \ldots . . .
\end{array}$ While doing her job in a 40-hour workweek, the employee helped 120 face-to-face, walk-in customers. Determine the standard time in minutes that it took her to help each customer.

Accepted Answer

The answer of An employee was observed over an extended...

Question 7

A fast-food stand has a thriving business in downtown Portland. They serve 3,500 burgers; 3,000 orders of fries; and 4,000 soft drinks per week. The workers work 40 hours per week but are idle two percent of the time. The manager wants to try to become more efficient. He has done a time study and found:
 $$\begin{array} { l l } 
\text { Elements for One ltem } & \text { Minutes } \
\text { Take order } & 2 \
\text { Time taken for kitchen to fill } & 5 \
\text { order } & \
\text { Pick up order \& put in bag } & 1 \
\text { Take customer's money } & 2
\end{array}$$ It takes 1 additional minute per additional item. The average order size is 3 items. 
a. What is the average number of orders per week?
b. What is the average cycle time (in minutes) per order?
c. What is the labor standard (in minutes) per order?
d. How many workers does the manager need per week?

Accepted Answer

The answer of A fast-food stand has a thriving business...

Question 8

The manager at a sewing factory uses a piece?rate pay system. She has just received an order for 600 dresses from a discount house downtown. She is trying to figure out what her costs are for the project. She has conducted a time study and found the following times for operations:
2 minutes to sew one sleeve
3 minutes to sew body of the dress
3.5 minutes to hem all unfinished edges
1 minute to attach the collar
3 minutes to attach all buttons
The workers must sit idle while they wait for supplies on the conveyor belt for an average of 30 seconds. Their performance rating is equal to one. She pays the workers $6.00 per hour.
a. What is the allowance factor for the operation?
b. What is the labor standard (in minutes) per dress?
c. What is the labor cost per dress?
d. What is the labor cost for the entire order of 600 dresses?

Accepted Answer

The answer of The manager at a sewing factory uses...

Question 9

A manufacturer made a commitment to supply 20 units of a product. The first unit took 1,200 hours to make, the second unit took 900 hours, and the third unit took 768 hours. Determine the total number of hours required to make the first ten (10) items.

Accepted Answer

The answer of A manufacturer made a commitment to supply...

Question 10

Determine the sample size for the following time study given a standard deviation of three ounces and a 92 percent probability that the value of the sample mean is within two ounces?

Accepted Answer

The answer of Determine the sample size for the following...

Question 11

A manufacturer made a commitment to supply 20 units of a product. The first unit took 1,200 hours to make, the second unit took 900 hours, and the third unit took 768 hours. How many hours should it take to make the 20th unit?

Accepted Answer

The answer of A manufacturer made a commitment to supply...

Question 12

A company manufactures tractors and lawnmowers. They have received an order for six deluxe custom riding lawnmowers for a local golf course. They must develop a cost estimate for the order. It is estimated that the first lawnmower will take 90 hours of shop time and a 75 per-cent learning curve is expected. The labor rate is $18.00 per hour, and the pricing policy of the company is to charge 2.5 times the cost of labor for the order.
a. How many hours should the sixth lawnmower take? 
b. How many labor-hours should the whole order take? 
c. What is the customer's price for the whole order?
d. What is the price per lawnmower?
e. If the original time estimate for the first lawnmower is too low, and it actually takes 80 hours for the third lawnmower, what is the labor hour estimate for the first unit?
f. If it actually really takes 80 hours for the third lawnmower, what is the new total labor cost for the entire order?

Accepted Answer

The answer of A company manufactures tractors and lawnmowers. They...

Question 13

Locksmith Inc. has an order from a bank for 50 specially designed safes, one for each branch. It is estimated that the first safe will require 75 hours of shop time and a 90 percent learning curve is expected. The labor rate is $15.00 per hour and the pricing policy of the company is to triple the labor cost of the order.
a. How many labor-hours should the 50th unit require?
b. How many labor-hours will the whole order require?
c. What is the customer's price for each safe?

Accepted Answer

The answer of Locksmith Inc. has an order from a...

Question 14

A company manufactures computer parts. They have received an order for 100 custom disc drives. It is estimated that the first drive will take 20 hours of shop time and an 80 percent learning curve is expected. The labor rate is $15.00, and the pricing policy is to charge 3 times the labor cost.
a. How many hours will the 100th disc drive take?
b. How many hours will the entire order take?
c. What is the price of the entire order?
d. What is the price per unit?

Accepted Answer

The answer of A company manufactures computer parts. They have...

Question 15

Based on data from a work-sampling study, an office worker spends 21.5 percent of his time filing. Over the work-sampling period, he was idle 12 percent of the time. If the worker filed 420 items in a 40-hour workweek while performing other activities, and if his performance rating factor for filing was 0.95, determine the standard time, in minutes, he took to file an item.

Accepted Answer

The answer of Based on data from a work-sampling study,...

Question 16

A furniture manufacturer has an order for 20 custom wine cabinets for a large hotel in Hawaii. It is estimated that the first cabinet will take 100 hours of shop time. An 85 percent learning curve is expected. The labor rate is $12.00 per hour. The pricing policy is to charge two times the labor cost for the order.
a. How many hours will the 20th wine cabinet take?
b. How many hours should the whole order take?
c. What is the price of each cabinet?

Accepted Answer

The answer of A furniture manufacturer has an order for...

Quiz 15: Appendix: Quality Management