Why libraries ensure correct component mapping in PCB Design - Business Case Study

Scenario Mode

👤 Your Role: You are a PCB design analyst working with the engineering team.

📋 Request: Your manager wants a report explaining why using libraries ensures correct component mapping in PCB design and how it impacts production quality.

📊 Data: You have data on PCB components, their library references, mapping accuracy, and production error rates.

🎯 Deliverable: Create a dashboard showing component mapping accuracy linked to library usage and explain the benefits of libraries in ensuring correct mapping.

Sample Data

Component_ID	Library_Used	Mapping_Accuracy (%)	Production_Errors
R1	Lib_A	99	0
C1	Lib_A	98	1
U1	Lib_B	95	2
R2	Lib_B	94	3
C2	Lib_C	90	5
U2	Lib_C	89	6
R3	Lib_A	99	0
C3	Lib_B	93	4

1

Step 1: Create a table showing average Mapping Accuracy and total Production Errors grouped by Library_Used.

Group data by Library_Used; calculate average of Mapping_Accuracy (%) and sum of Production_Errors.

Expected Result

Lib_A: Avg Accuracy=98.67%, Total Errors=1; Lib_B: Avg Accuracy=94%, Total Errors=9; Lib_C: Avg Accuracy=89.5%, Total Errors=11

2

Step 2: Create a bar chart with Library_Used on X-axis, average Mapping Accuracy (%) on primary Y-axis, and total Production Errors on secondary Y-axis.

Configure bar chart with dual Y-axes; bars for average Mapping Accuracy, line for Production Errors.

Expected Result

Chart shows Lib_A highest accuracy and lowest errors; Lib_C lowest accuracy and highest errors.

3

Step 3: Add a text box explaining that libraries standardize component data, reducing mapping errors and production defects.

Text: 'Using libraries ensures components are correctly mapped, improving accuracy and reducing errors in production.'

Expected Result

Clear explanation visible on dashboard supporting the data.

Final Result

Library Used | Avg Mapping Accuracy (%) | Total Production Errors
-------------------------------------------------------------
Lib_A       | ######################### 98.67% | **1
Lib_B       | ################## 94%          | ****9
Lib_C       | ############### 89.5%           | ******11

Explanation:
Using libraries ensures components are correctly mapped, improving accuracy and reducing errors in production.

✓Libraries with higher usage show better mapping accuracy.

✓Better mapping accuracy correlates with fewer production errors.

✓Standardized libraries help reduce costly production defects.

Bonus Challenge

Create a DAX measure to calculate the correlation coefficient between Mapping Accuracy and Production Errors by Library.

Show Hint

Use the CORREL function on Mapping_Accuracy and Production_Errors columns grouped by Library_Used.