Answer questions $9,10$ and $11$ based on the case and data given in the following: An industrial engineer applies work sampling to an quality control operator. She makes $600$ observations throughout a work week. In $480$ observations the operator performs quality control of a product, and he was idle in remaining $120$ observations. During sampling week, operator's total work duration is $40$ hours, and he controlled totally $1600$ parts. Mean Westinghouse rating is $1\mathrm{.}25$ for the operator, and $30\%$ allowances are applied to this task. $($Round up your result if necessary$)$

$9.(5$ points$).$ Based on these data, what is the mean cycle time for controlling one product $($Calculate in seconds$)?$

a$.)48$ seconds

b$.)32$ seconds

c$.)15$ seconds

d$.)144$ seconds

e$)72$ seconds

$4$:$56$

Answer questions $9,10$ and $11$ based on the case and data given in the following: An industrial engincer applies work sampling to an quality control operator. She makes $600$ observations in remaining $120$ obseek. In $480$ observations the operator performs quality control of a product, and he was idle controlled totally $1600$ pare. Muring sampling week, operator's total work duration is $40$ hours, and he

$9.(5$ points$).$ Based on these data, what is the mean cycle time for controlling one product $($Calculate in seconds$)?$

a$.)48$ seconds

b$.)32$ seconds

c$.)15$ seconds

d$.)144$ seconds

e$)72$ seconds

$10.(5$ points$).$ Based on these data, what is the standard time for controlling one product $($Calculate in seconds$)?$

a$.)78$ seconds

b$.)52$ seconds

c$.)25$ seconds

d$.)92$ seconds

e$)117$ seconds

$11.(5$ points$).$ Is number of observations statistically sufficient for this study? $($Based on $95\%$ confidence level$).$

a$)$ No$,$ we have $480$ observations on quality control, but need $600$ observations:

b$)$ Yes, necessary number of observations is $246,$ we have $600$ observations.

c$)$ No$,$ we need to take $246$ obervations more.

d$)$ Yes, necessary sample size is $480,$ we have $600$ observations.

e$)$ None of them

$12.(5$ points$)$ Remember multiple activity $($gang$)$ chart. Which data can be obtained by using a multiple activity chart?

Utility level of workers

Utility level of machines

Quality of the product

Transportation flow directions

Flow of the process

$($a$.)1$ and $2$

b$.)1,2$ and $3$

c$.)1,2$ and $5$

d$.)3,4,$ and $5$

e$)1,4,$ and $5$

$(5$ points$)$ Which options are VALUE ADDED process steps?

Carrying half$-$completed parts to next workstation

Assembling a part using a nail gun

Bringing packaging material from the storage to the packing line

Waiting for products to be packed by other workers

a$.)1$ and $3$

b$.)2,3,$ and $4$

c$.)1,3,$ and $4$

d$.)$ Only $4$

e$)$ Only $2$

$(5$ points$)$ Assume that you are calculating standard time for a process. Which factors below should be included in "variable allowances"?

Worker's posture

Machine maintenance

Noise level in the work place

Logistic problems

Weights lifted by the worker

a$.)1,3,$ and $5$

b$.)4$ and $5$

c$.)1$ and $5$

d$.)2$ and $7$

e$)$ All of them