The percentage of idle time for personnel or machinery is calculated through___________________?
Show answer Hide answer
Answer: A. work sampling
Explanation
Work sampling utilizes statistical random observations to determine personnel idle percentages. Random snapshot observations measure the proportion of time machines spend working. This observational technique evaluates operational efficiency without requiring continuous stopwatch recording. Work sampling relies on the laws of probability and statistical normal distributions. Observers record worker activity states at random time intervals throughout the shift. Large sample sizes ensure high statistical confidence levels for calculated idle percentages.
Plant managers use work sampling to evaluate machine utilization in busy workshops. Hospital administrators apply work sampling techniques to assess nursing staff activity distributions. Identifying high machine idle times helps supervisors improve overall plant productivity. Time study involves continuous timing of specific manual tasks using a stopwatch. Method study focuses on improving operational procedures rather than measuring idle times. Work study is an umbrella term encompassing both time and method studies.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. In which of the following factory layout configurations is line balancing strictly required_______________?
Show answer Hide answer
Answer: B. product layout
Product layouts feature machines arranged in a strict sequential order matching the manufacturing steps of a specific product. Line balancing is strictly required in this configuration to ensure that every workstation op...
Q2. A circular node symbol (O) on a PERT/CPM network diagram represents____________________?
Show answer Hide answer
Answer: A. an ordinary event
In standard PERT and CPM network notation, circular nodes represent ordinary project events. An event node marks a specific instant in time representing the start or completion of project activities. Drawing circular sym...
Q3. The PERT technique utilizes how many distinct time estimates for tasks_________________?
Show answer Hide answer
Answer: C. three time estimate
PERT uses three time estimates—optimistic, most likely, and pessimistic—to account for uncertainty in activity durations. Project evaluation and review techniques incorporate three distinct duration estimates to calculat...
Q4. Spot the erroneous statement concerning the practical benefits of work sampling_________________?
Show answer Hide answer
Answer: A. permits a fine breakdown of activities and delays
Work sampling involves taking random instantaneous observations and is entirely unsuited for capturing fine breakdowns of minute activities or delays. Continuous time study using stopwatches is the correct methodological...
Q5. Pessimistic time estimate in network planning is defined as___________________?
Show answer Hide answer
Answer: A. the maximum time which an activity might require
The pessimistic time estimate represents the maximum possible duration an activity might require under adverse conditions. Project planners use this value in PERT analysis to account for unexpected delays, equipment fail...
Q6. Internal material handling within the automotive manufacturing sector is typically executed via_________________?
Show answer Hide answer
Answer: A. overhead crane
Overhead cranes are widely utilized in heavy manufacturing sectors like automotive assembly for lifting and moving large components internally. Overhead bridge cranes span across production bays to hoist and transfer hea...