A Pilot Work Study Has Been Conducted on a New

question 13

Essay

A pilot work study has been conducted on a new operation with four work elements.The following times,in seconds,were obtained using the continuous method.
$$\begin{array} { c } { \text { Observations } } \\\begin{array} { | c | c | c | c | c | c | c | } \hline \text { Element } & 1 & 2 & 3 & 4 & 5 & R F \\1 & 11.00 & 45.00 & 80.00 & 117.00 & 153.00 & 1.10 \\2 & 20.00 & 54.00 & 89.00 & 125.00 & 161.00 & 1.05 \\3 & 25.00 & 58.00 & 95.00 & 131.00 & 166.00 & 0.85 \\\hline\end{array}\end{array}$$
a.What is the normal time for this operation?
b.If an allowance of 20 percent is used,what is the standard time for this task?
c.What sample size is appropriate for estimating the time for element 3 within ± 3 percent of the true mean time with 95 percent confidence?

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Definitions:

Collection System

A method or process used to gather or accumulate items, information, or debts from various sources.

Countermand

To revoke, cancel, or reverse an order or directive that has been previously issued.

Stop Payment Order

A request made to a bank by an account holder not to pay a check or payment that has been issued but not yet cashed.

Banker's Acceptance

A short-term financial instrument issued by a company but guaranteed by a bank as accepted for payment at a future date, often used in international trade.