1. Refund Ratio (%)
Refund Ratio = (Refunded Items / Total Items) * 100
This shows the percentage of problematic purchases, helping identify issues with specific items, sellers, or timeframes.
PinguBuy Spreadsheet: Analyzing Refund & QC Performance
2026-04-12
Effectively monitoring your PinguBuy data is key to optimizing your purchasing strategy. This guide will show you how to transform raw spreadsheet data into clear, actionable charts for refund ratios, quality control (QC) pass rates, and average shipping costs over time.
Step 1: Prepare Your Data
Ensure your PinguBuy spreadsheet has the following columns consistently logged over multiple time periods (e.g., weeks or months):
- Time Period:
- Total Orders/Items:
- Refunded Orders/Items:
- Items Inspected:
- Items Passed QC:
- Total Shipping Cost:
- Total Shipped Items/Parcels:
- Total Orders/Items:
Step 2: Calculate Key Metrics
Add calculation columns to your sheet. For each time period, compute:
2. QC Inspection Pass Rate (%)
QC Pass Rate = (Items Passed QC / Items Inspected) * 100
This measures the reliability of seller quality. A dropping pass rate may indicate you need to switch sellers or provide more detailed specifications.
3. Average Shipping Cost
Average Shipping Cost = Total Shipping Cost / Total Shipped Parcels (or Items)
Track this to understand cost trends and evaluate the efficiency of your parcel consolidation strategy.
Step 3: Create Charts
Use your spreadsheet software's chart tool (like in Google Sheets or Microsoft Excel).
Chart 1: Refund Ratio & QC Pass Rate Over Time (Dual-Axis Line Chart)
- X-Axis:
- Primary Y-Axis (Refund Ratio):Refund Ratio
- Secondary Y-Axis (QC Rate):QC Pass Rate
- Primary Y-Axis (Refund Ratio):Refund Ratio
Insight:
Chart 2: Average Shipping Cost Over Time (Line or Bar Chart)
- X-Axis:
- Y-Axis:
- Use a line chart to show trends, or a bar chart to emphasize cost per discrete period.
- Y-Axis:
Insight:
Chart 3: Combined Performance Dashboard (Optional)
Create a separate dashboard sheet featuring all three metrics in individual sparklines (mini-charts) or a single combined chart for an at-a-glance view of performance trends over the last 6-12 months.
Step 4: Analyze and Act
With your charts created, look for these patterns:
- Upward Trend in Refund Ratio:
- Downward Trend in QC Pass Rate:
- Spikes in Average Shipping Cost:
- Correlation:
- Downward Trend in QC Pass Rate: