In manufacturing systems, what best characterizes a discrete parts process compared with other process types?
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AIt is the same as a continuous process but uses a different controller
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BIt is often encountered in manufacturing environments
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CIt is normally a repetitive series of operations
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D(b) and (c)
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ENone of the above
Answer
Correct Answer: (b) and (c)
Explanation
Introduction / Context:Manufacturing processes are broadly categorized as discrete, continuous, or batch. This question focuses on discrete parts processes, where individual units are produced and operations are typically executed in repeatable sequences at workstations or on assembly lines.
Given Data / Assumptions:
- Outputs are countable items such as components or assemblies.
- Operations follow routings or standardized work instructions.
- Control strategies may include PLCs, robots, and vision systems.
Concept / Approach:
Discrete manufacturing emphasizes unit by unit flow, changeovers, and work in progress control. The repetitive nature enables standard cycle times, takt alignment, and quality checks per unit. This is distinct from continuous processes that transform materials without discrete unit boundaries.
Step-by-Step Solution:
1) Identify discrete outputs: finished units are countable and traceable by serial or lot.2) Recognize repetition: sequences such as pick, place, fasten, and test repeat for each part.3) Distinguish from continuous: continuous processes run without distinct unit count and are controller independent of the discrete definition.4) Hence statements b and c jointly describe discrete parts processing.Verification / Alternative check:
Production line studies show standardized work cycles and repetitive operations as hallmarks of discrete manufacturing.
Why Other Options Are Wrong:
Option a is incorrect because discrete versus continuous is not merely a controller choice. Option e is invalid because b and c are accurate. Choosing only b or only c misses the full characterization, therefore option d is best.
Common Pitfalls:
Assuming all repetitive operations imply high volume only; discrete processes can be high mix with frequent changeovers.
Final Answer:
(b) and (c)