Home > GTBuy: How to Analyze Seller Accuracy with the GTBuy Spreadsheet

GTBuy: How to Analyze Seller Accuracy with the GTBuy Spreadsheet

2026-02-19

A data-driven approach to selecting consistently trustworthy vendors by monitoring key performance metrics.

In global sourcing and procurement, consistent seller reliability is paramount. The GTBuy Spreadsheet is a powerful tool that transforms raw transactional data into actionable insights, empowering buyers to make informed decisions. By systematically tracking inspection success rates, delays, and response times, you can build a supply chain founded on verified performance, not just promises.

Core Metrics for Seller Analysis

The GTBuy Spreadsheet typically structures seller performance around three critical pillars of accuracy and reliability:

  • Inspection Success Rate:
  • On-Time Delivery Rate:
  • Average Response Time:

Step-by-Step Analysis Process

Step 1: Data Entry & Normalization

Populate your GTBuy Spreadsheet consistently after every order or interaction. Ensure data points like Seller Name, Order Date, Promised Delivery Date, Actual Delivery Date, Inspection Result (Pass/Fail), and Query Response Timestamps

Step 2: Calculating Performance Scores

Use spreadsheet formulas to generate quantifiable metrics for each seller:

  • Success Rate:(Number of Passed Inspections / Total Inspections) * 100
  • Delay Frequency:(Number of Orders Delayed / Total Orders) * 100. Also, calculate the Average Delay Duration.
  • Avg. Response Time:

Step 3: Trend Identification & Vendor Tiering

Don't just look at averages; visualize data over time. Is a seller's success rate improving or declining? Create a tiering system (e.g., A, B, C Tier) based on threshold values you set (e.g., A-Tier: >95% Success, <5% Delay, <4h Response). This visually segments consistently trustworthy vendors from risky ones.

Step 4: Contextual Review

Add a notes column for qualitative context. Was a delay due to a well-communicated port strike? Did a one-time product fail stem from a specific component issue now resolved? This contextual layer prevents unfair penalization and rewards transparent sellers.

Pro Tips for Your Spreadsheet Management

  • Use Conditional Formatting
  • Create Pivot Tables & Charts
  • Establish a Regular Review Cadence
  • Share the key findings (not necessarily the raw sheet) with your team to align sourcing decisions.

Building a Foundation of Trust

The GTBuy Spreadsheet moves vendor selection from anecdotal evidence to objective analysis. By diligently tracking and analyzing seller accuracy metrics, you cultivate a supplier base defined by proven reliability. This disciplined approach minimizes risk, reduces unexpected costs, and fosters stronger, more transparent relationships with vendors who consistently demonstrate trustworthiness through their data.

Start tracking, start analyzing, and transform your procurement strategy into a competitive advantage.