A purchasing agent buys the things a business needs to run: raw materials, parts, equipment, supplies and services. The job is to get the right item, in the right amount, at the right quality, at a fair price, and on time. You do this by writing clear specifications, getting competing bids, comparing suppliers, negotiating, and then checking that suppliers keep their promises. It rewards people who read carefully, do math with confidence, and talk with suppliers and coworkers. About 65% of people in this job have a bachelor's degree, but 15% have a high school diploma, so a clerk or expediter
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Stage 1 of 4 · about 10 weeks
Understand the procure-to-pay cycle (requisition, RFQ, purchase order, receiving, invoice, payment), basic supply chain vocabulary, and the math of price: unit cost, percentages, and total cost of ownership. Get comfortable in Excel (formulas, sorting, filters, VLOOKUP/XLOOKUP, pivot tables). Practice writing short, clear emails and specifications.
The procure-to-pay cycle and supply chain vocabulary
Every task a purchasing agent does sits somewhere in this cycle. If you know who does what at each step and which document moves it forward, you can follow any order, find where it is stuck, and speak the language that suppliers and coworkers use.
The math of price: unit cost, percentages and total cost of ownership
Buyers are paid to find the best value, and that starts with correct arithmetic. The cheapest quote on paper is often not the cheapest in reality once freight, discounts, defects and terms are counted.
Excel for purchasing: formulas, lookups and pivot tables
Most purchasing work lives in spreadsheets: quote comparisons, price lists, open-order trackers, spend reports. If you are fast in Excel you will do in minutes what others do in hours, and employers test for it.
Clear business writing: supplier emails and simple specifications
Purchasing is mostly communication in writing. A vague email causes wrong parts and late deliveries; a clear one gets a fast, accurate quote and creates a paper trail that protects you.
Then 3 more stages (about 90 weeks in all) with lessons, drills, projects, 10 interview questions with strong answers and free resources.