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EastMallBuy: How to Analyze QC Trends Using the Spreadsheet

2026-02-28

Finding a reliable supplier is crucial for long-term success in e-commerce. The EastMallBuy Quality Control (QC) Spreadsheet is a powerful tool designed to help you move beyond single-inspection results and uncover valuable trends in both product quality and seller performance over time. This guide will show you how to leverage it to identify your most dependable partners.

Step 1: Data Entry & Structure

Consistency is key. Ensure your spreadsheet logs every inspection with the following core data points for each order or batch:

  • Supplier Name/ID:
  • Inspection Date & Month:
  • Product SKU/Description:
  • Quantity Inspected & Quantity Passed:
  • Major & Minor Defects Found:
  • Final Verdict:

Step 2: Calculate Key Metrics

Create calculated columns to transform raw data into actionable metrics. The most important are:

  • Monthly Pass Rate (%)
  • Defect Rate (%)
  • Trend Direction:

Step 3: Visualize Trends with Pivot Tables & Charts

Use Pivot Tables (in Excel/Google Sheets) to summarize and visualize the data.

  • Supplier vs. Month View:
  • Product-Level Analysis:
  • Create a Line Chart:

Step 4: Analyze for Reliability

Look beyond the average. A truly reliable supplier demonstrates:

  • Consistency:95%) with minimal month-to-month fluctuation.
  • Improvement:
  • Transparency & Response:
  • Risk Awareness:

Step 5: Make Data-Driven Sourcing Decisions

Use your analysis to segment your suppliers and guide your procurement strategy:

  • Tier 1 (Primary Suppliers):
  • Developmental Tier:
  • Review/Replace Tier:

Conclusion

The EastMallBuy QC Spreadsheet is more than a record-keeping tool; it's a strategic asset for building a resilient supply chain. By systematically tracking pass rates and analyzing multi-month trends, you shift from reactive inspection to proactive supplier management. This process allows you to confidently identify and invest in your most dependable suppliers, reducing risk, saving costs, and ensuring a better experience for your customers.

Start analyzing trends today—your most reliable supplier partnership might already be in your data, waiting to be discovered.