15 Questions
The standard time is the normal time without any allowance for losses.
False
The APFD represents the standard time as a percentage of the normal time.
False
The standard time is the time taken by an exceptional worker to process one work unit.
False
The formula to calculate the standard time is Tstd = Tn / APFD.
False
The standard time is used to measure the work efficiency of an average worker.
True
Normal time is the time needed to complete an operation by an employee working at 50% efficiency.
False
Normal time calculation takes into account time allowances for delays.
False
Normal time is a measure of an employee's performance at a normal pace.
True
Work efficiency analysis is not related to the calculation of normal time.
False
Standard time determination is a separate concept from normal time calculation.
False
The total shift time is equal to the actual worked time multiplied by the allowance factor.
True
The worker's performance is 80% efficient according to the given information.
False
The standard time for the task is 6.956 hours per shift.
False
The total shift time is 8.0 hours, which includes the allowance factor of 15%.
True
The production rate is 120 parts per shift, assuming 100% worker's performance.
True
Study Notes
Standard Time and Normal Time
- Standard time (Tstd) is the normal time (Tn) with an allowance for losses due to personal time, fatigue, and delays.
- Standard time is calculated using the formula: Tstd = Tn (1 + APFD), where APFD is the PFD allowance factor.
- It is the time allowed for an average worker to process one work unit using the standard method and working at a normal pace.
- Normal time (Tn) is the time needed to complete an operation by an employee working at a normal pace and at 100% efficiency, with no delays and no time allowances.
Calculating Standard Time
- The formula to calculate total shift time is: Total shift time = Actual worked time + (APFD x Actual worked time)
- Example: If APFD is 15% and the total shift time is 8.0 hours, the actual worked time can be calculated as: Actual worked time = 8 / 1.15 = 6.956 hours/shift
- The production quantity (Q) can be calculated using the formula: Q = (Actual worked time x 60) / 3.48, where Q = 120 parts/shift
Key Concepts
- PFD allowance factor (APFD) is a percentage value that accounts for losses due to personal time, fatigue, and delays.
- The formula to calculate standard time takes into account the APFD to determine the total time required to complete a task.
Learn how to calculate the standard time for an average worker to process a work unit, considering personal time, fatigue, and delays. Understand the formula and its components. Test your knowledge of industrial engineering concepts!
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