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Identify the error in this cost calculation formula for PCB design:

medium📝 Formula Fix Q14 of 15
PCB Design - Multi-Layer PCB Design

Identify the error in this cost calculation formula for PCB design:

Cost = Number_of_layers + Cost_per_layer * Complexity_score
AComplexity_score should not be included in cost calculation
BMultiplication should be done before addition using parentheses
CThe formula should use addition only, no multiplication
DThe formula should multiply Number_of_layers by Cost_per_layer first
Step-by-Step Solution
Solution:

  1. Step 1: Analyze the intended cost components

    Cost depends on number of layers and cost per layer multiplied, complexity affects design but not direct cost here.

  2. Step 2: Identify correct formula structure

    Number_of_layers should multiply Cost_per_layer first, then complexity can be considered separately.

  3. Final Answer:

    The formula should multiply Number_of_layers by Cost_per_layer first -> Option D

  4. Quick Check:

    Cost = layers x cost per layer first [OK]
Quick Trick: Multiply layers by cost per layer before adding complexity [OK]
Common Mistakes:
MISTAKES
  • Ignoring operator precedence
  • Including complexity directly in cost without context
  • Using addition instead of multiplication

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