Writing a Custom Vending Requirement: Replace Adjectives with an Observable Result

Turn a vague feature request into a statement a buyer and supplier can check.

2026-10-16

A custom vending requirement should explain an observable outcome. Words such as fast, flexible and user-friendly describe preferences but leave the buyer and manufacturer free to interpret them differently. A requirement register gives each important request a defined purpose and a way to review it.

Use five fields

Give the requirement an identifier. Describe the user or operator task, the condition in which it occurs, the expected result and the evidence needed for acceptance. Add an owner who can answer questions about the business need.

For example, a request to support a particular packaged item should identify the approved package revision and the intended delivery arrangement. The test method and acceptance conditions must be agreed for that project; do not assume that one successful demonstration proves compatibility with all future packages.

Separate the need from a proposed mechanism

A buyer may request a particular component because it appears to solve an operating problem. Describe that problem as well. This lets the manufacturer explain whether a standard arrangement can meet the need or whether development is necessary.

Avoid combining several outcomes into one line. If stock visibility, customer messaging and service access have different acceptance evidence, keep them separate.

Close each line deliberately

Mark a requirement as agreed, rejected, deferred or unresolved, with a date and reason. Do not quietly remove a difficult line during a drawing revision. Before prototype approval, review unresolved requirements with the person authorized to make the decision.