You do not need to settle every engineering detail before starting a conversation. A useful brief explains the intended product, its present state and the decision or result you need next.

1. Describe the intended use

Explain who uses the product, what it should do and where it will operate. Identify the functions that matter most for the first version.

2. Show what exists

List the sketches, specifications, schematic and PCB files, firmware sources or prototype hardware that are available. Identify the current revision and any limits on access or sharing.

3. Define the next result

Describe what a useful milestone would be: a reviewed architecture, a first board, working firmware, an investigated fault or a manufacturing package.

4. State the constraints

Include size, power, interfaces, environment, expected quantities and target timing where known. Mark assumptions and undecided items so they can be discussed.

5. Agree what will be checked and handed over

Before work starts, agree the deliverables, acceptance checks, dependencies and review points. Confirm which design files, source code, test records and instructions are included.