Say it like this
- We need a design doc for this before we kick off
- Can you send over the design doc?
- Let's review the design doc in today is meeting
Use it at work
Starting work
- I'll write a design doc before we start coding.
- Can you review my design doc by Wednesday?
Giving feedback
- I left comments in the design doc about the caching part.
- The design doc doesn't cover failure cases yet.
Sharing
- The design doc is linked in the ticket.
- Let's discuss the open questions at the end of the design doc.
Don't say this
Design doc is a noun, not a verb. You write or create a design doc, not design doc something.
Don't mix it up
| Term | What it is | Who writes or uses it | When |
|---|---|---|---|
| design doc | How a system will be built | Engineers | Before building |
| RFC | Proposal shared for feedback | Engineers | Before deciding |
| technical spec | Detailed technical requirements | Engineers | Before or during building |
Practice
Try it
4 quick exercises
1. Your team is about to start a major project. What do you say?
2. Before we implement the search feature, we need to _______ and get feedback from stakeholders.
3. Which sentence uses 'design doc' incorrectly?
4. Rewrite this in natural tech English using 'design doc': 'We need to write down the plan for how this system will work before anyone starts programming it.'
Say it out loud
Phrase 1 of 3
"We need a design doc for this before we kick off"
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More about design doc
Real examples(3)
- in a standup
"We're blocked on the API changes until the design doc is approved by the tech lead."
- in a planning meeting
"The design doc outlines three possible approaches; let's discuss the trade-offs of each."
- in an email
"I have published the design doc for the authentication redesign here; please add comments by Friday."
More mistakes(2)
Handle with care. Do not use as a verb (saying we need to design doc something). It is a noun referring to a document, not an action.
- ✕Let us start coding; we can do the design doc later.✓Let's write the design doc first, then start coding.
Design docs should be written before development begins, not after. Writing it later defeats the purpose.
- ✕The design doc is ready, so we are done with design.✓The design doc is approved, so we can start implementation.
A design doc is only the planning stage; implementation and testing still follow.
Other forms(2)
- design doc noun
"The design doc was 15 pages long."
- design doc review noun phrase
"We scheduled a design doc review for next Tuesday."
Often used with(4)
- write a design doc · The most common action; creating a design doc from scratch
- review a design doc · Reading and providing feedback on someone else's design doc
- approve a design doc · Formally accepting the design doc so development can begin
- design doc template · A standard format or structure companies use for all their design docs
Similar words(3)
- design document · Formal, full version of design doc; same meaning, slightly more formal
- technical specification · Similar but slightly broader; may focus more on technical details than high-level design
- proposal · Less technical; emphasizes the what and why rather than the how
Questions(5)
- What does design doc mean in software engineering?
- A design doc is a comprehensive written plan created before development begins. It describes what a feature or system will do, how it will work technically, the architecture and approach chosen, potential risks, and the reasoning behind key decisions. It is used to align the team and get approval from decision-makers before expensive engineering work starts.
- How do you use design doc in a sentence at work?
- You typically use it as a noun: Send me the design doc, review the design doc, or approve the design doc. For example: 'Can you read the design doc for the payment system and give feedback by Friday?' or 'The design doc shows three different approaches.'
- Is design doc formal or informal?
- Design doc is neutral to informal in tone. It is the standard term used in tech companies of all sizes, in both casual standups and formal reviews. The word itself is casual shorthand; formal writing might say design document, but in most modern tech workplaces, design doc is completely appropriate.
- When should a design doc be written?
- A design doc should be written during the planning phase, before engineering begins implementation. For large or risky projects, it is written early. For smaller features, it might be written just days before development starts. The key rule is: design doc first, code second.
- Who writes a design doc?
- Usually the engineer or tech lead who will be responsible for building the feature. Sometimes a product manager, architect, or senior engineer initiates it. The document is then shared with the team and stakeholders for review and feedback.
