Home > PinguBuy Spreadsheet: A Guide to Analyzing Refund & QC Performance

PinguBuy Spreadsheet: A Guide to Analyzing Refund & QC Performance

2026-03-03

Leveraging data visualization to track supplier reliability and shipping efficiency.

For dropshippers and e-commerce entrepreneurs using PinguBuy, maintaining profitability hinges on supplier performance. A well-structured spreadsheet, paired with dynamic charts, transforms raw data into actionable insights. This guide will walk you through analyzing three key metrics: Refund Ratios, Quality Control (QC) Pass Rates, and Average Shipping Costs

1. Structuring Your Performance Spreadsheet

Start with a table that logs data consistently (e.g., weekly or monthly).

Period (Week/Month) Total Orders Refunded Orders QC Inspections Passed QC Inspections Failed Total Shipping Cost
2024-W05 150 12 138 5 $845.50
2024-W06 165 8 160 2 $912.75

From this base, you can calculate our three core performance indicators per period:

  • Refund Ratio (%)
  • QC Pass Rate (%)
  • Avg. Shipping Cost ($)

2. Creating Insightful Charts

Visualize the calculated metrics using a line or combo chart. Most spreadsheet tools (like Google Sheets or Excel) have built-in charting features.

Chart 1: Refund Ratio & QC Pass Rate Trend (Dual-Axis Line Chart)

This chart reveals the correlation between quality and refunds.

[Visual: A line chart with Period on the X-axis. Two Y-axes: Left for Refund Ratio (%), line trending downward. Right for QC Pass Rate (%), line trending upward. An inverse relationship is often visible.]

Insight:

Chart 2: Average Shipping Cost Over Time (Line Chart)

This tracks logistics cost efficiency.

[Visual: A line chart showing Period on the X-axis and Average Shipping Cost ($) on the Y-axis. The line may show gradual increases, seasonal spikes, or cost-saving improvements.]

Insight:

Chart 3: Monthly Performance Dashboard (Bar & Gauge Combo)

For a high-level overview, create a dashboard.

[Visual: A bar chart for monthly Refund Ratios, a gauge chart for current month's QC Pass Rate (target: >95%), and a trend sparkline for Avg. Shipping Cost.]

Insight:

3. Turning Analysis into Action

Data alone is not enough. Here’s how to act on your charts:

  1. Set Threshold Alerts:
  2. Supplier Scoring:
  3. Cost Forecasting:
  4. Communicate with PinguBuy:

By systematically tracking and charting Refund Ratios, QC Pass Rates, and Average Shipping Costs

Pro Tip: