Purchasing
Checklist
Before You Place a Purchase Order
A purchase order is more than a price and quantity. Before buying a manufactured component, there are specifications to verify, suppliers to evaluate, quality requirements to define and delivery risks to consider.
Before You Release the PO
- Latest drawing revision
- Material specification
- Supplier capability
- Quality requirements
- Price & lead time
- Documentation
What Should You Check Before Buying a Manufactured Part?
Procurement problems often begin before the purchase order is released. A missing drawing revision, unclear material requirement, incomplete inspection criteria or unrealistic delivery expectation can create problems much later in the manufacturing process.
This purchasing checklist gives engineering, procurement and quality teams a practical framework for reviewing the important details before purchasing machined, fabricated, cast, forged or assembled components.
9 Things to Check Before Purchasing
Drawing & Revision
Make sure the supplier is working from the correct engineering information.
- Latest drawing revision
- Part number
- Revision level
- Special notes
Material Specification
Material substitutions can affect component performance, machining and final quality.
- Material grade
- Material standard
- Heat treatment
- Material certificate
Manufacturing Process
Confirm that the proposed manufacturing method can consistently produce the required component.
- CNC machining
- Fabrication
- Casting / forging
- Secondary operations
Tolerances & Critical Features
Not every dimension carries the same manufacturing risk. Identify the features that matter most.
- Dimensional tolerances
- GD&T requirements
- Critical dimensions
- Surface finish
Inspection Requirements
Define how conformity will be verified before production begins.
- Inspection plan
- Inspection report
- CMM requirements
- Special inspection
Supplier Capability
A low quotation does not help if the supplier cannot reliably manufacture the component.
- Machine capability
- Quality systems
- Previous experience
- Available capacity
Price & Lead Time
Compare quotations using the complete commercial picture rather than unit price alone.
- Unit price
- Tooling cost
- Lead time
- Payment terms
Required Documents
Agree on documentation requirements before production starts.
- Inspection reports
- Material certificates
- Certificate of Conformance
- Traceability records
Packaging & Delivery
A good component can still arrive damaged or late if logistics requirements are unclear.
- Packaging method
- Delivery location
- Delivery schedule
- Transportation responsibility
Before You Release the PO
A five-minute review before releasing a purchase order can prevent weeks of avoidable clarification, rework and delivery problems.
What Often Goes Wrong?
Buying From the Cheapest Quotation
Unit price is only one part of procurement cost. Rejection, delays, additional inspection and rework can quickly change the economics of a purchase.
Sending an Outdated Drawing
A supplier can manufacture exactly what was sent and still deliver the wrong component if the drawing revision is outdated.
Defining Inspection Too Late
Quality requirements are much easier to control when they are defined before production rather than after the parts are completed.
Assuming Every Supplier Can Make Every Part
Machine envelope, tolerance capability, inspection equipment and process experience can differ significantly between suppliers.
Explore More Manufacturing Resources
The purchasing checklist is only the starting point. Explore practical guides covering RFQs, supplier evaluation, manufacturing quality, inspection and procurement.
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View Case Studies →Manufacturing & Procurement Blog
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Explore Resources →A Better Purchase Starts Before the PO
Use this checklist whenever you purchase a manufactured component — especially when tolerances, material, quality or delivery requirements are critical.