Building a Trustworthy Marketplace: How to Create a Seller Ranking System with the GTBuy Spreadsheet

Step 1: Define Metrics & Data Columns

In your GTBuy sheet, create dedicated columns to log raw data for each seller. For example:

Seller ID	QC Pass Rate (%)	Avg. Delivery Days	Avg. Response (Hours)
Vendor_A	98.5	4.2	1.5

Step 2: Establish Scoring Rubric

Define how raw data converts to a score (e.g., 1-100 per category). Example for QC:

• Pass Rate ≥ 98%: 100 points
• 95-98%: 80 points
• 90-95%: 60 points
• Below 90%: 40 points

Apply similar scales for Delivery Speed (faster = higher score) and Response Time (shorter = higher score).

Step 3: Calculate Weighted Total Score

Not all categories are equally important. Use formulas to calculate a weighted total. For instance:

Total Score = (QC_Score * 0.5) + (Delivery_Score * 0.3) + (Response_Score * 0.2)

This weighting prioritizes product quality while still valuing logistics and communication.

Step 4: Assign Ranking Tiers

Classify sellers into clear tiers based on their total score to make interpretation instant:

Tier	Score Range	Label
A+	95-100	Top Trusted
A	85-94	Reliable Partner
B	70-84	Satisfactory
C	Below 70	Needs Review