Documents for Decision-Makers
Review the different documents—PRD vs. 2-pager vs. design doc—that help Staff+ engineers make better decisions.
We'll cover the following...
At junior and mid-level, you mostly receive documents. PMs hand you a PRD, senior engineers share a design document, and you build.
At Staff+, that’s not enough. You need to be able to write and shape the docs that change roadmaps.
That means you need fluency across three types of documents:
PRD (product requirements document): Usually led by PMs, you should be able to write or co-author one. At minimum, you pressure-test PRDs by sharpening the problem, user, and metric so they’re decision-ready.
2-pager (decision memo): This is often your ownership zone. It bridges business goals and technical execution, lays out options, and quickly gets leadership to a yes/no.
Design document: This is yours (sometimes with your team). It turns the decision into a concrete execution plan—architecture, risks, rollout, trade-offs.
Together, these artifacts create a 3-step process for product change:
Start with a five-line PRD.
Decide with a two-pager.
Land the decision with a design doc.
Let’s talk about what each one entails.
The 5-line PRD
Your aim: capture the “what and why” in five lines.
Problem: One sentence on what’s broken or expensive today. Skip solutions—name the pain and where it shows up.
User/segment: Who exactly feels that pain? Name a concrete slice (role, plan tier, region) so you don’t design for “everyone.”
Outcome metric: Pick a number you will move, with a target and a timeframe.
Constraints/assumptions: What is fixed or off-limits (privacy rules, timelines, tech choices, budget)?
Non-goals: Write what you are not doing so scope doesn’t creep.
If a teammate can restate your ask in 15 seconds after reading these five lines, you nailed it.
For our “Reports Dashboard” example, this looks like:
Problem: “Reports Dashboard loads too slowly; users abandon before seeing insights.”
User/segment: “Team admins on growth and mid-market plans.”
Outcome metric: “Cut p95 load time from ~4.5s → ≤ 2.0s and lift weekly report completions +15% in 60 days.”
Constraints/assumptions: “No extra infra spend; stay on current analytics warehouse; must be behind a feature flag.”
Non-goals: “No new charts or UI redesign; no changes to underlying data model this quarter.”
The 2-pager
This is your decision memo—a short document a VP can skim between meetings and say, “Yes, do Option B.” It connects the 5-line PRD to a clear path forward.
Here’s the structure:
TL;DR (3–5 lines): Problem, metric, and your recommended option.
Options table (A/B/C): Lay out 2-3 real choices in a tiny table: impact (on the metric), effort (people × weeks), risks, and time to learn (how soon we’ll know if it worked)
Evidence: Back your point with whatever you can find—data points, user quotes, experiment results, etc.
Risks and guardrails: Define top 2–3 risks + your safety rails (flag, rollback, telemetry).
Decision ask + next steps: Write the question you need answered (“Approve Option B”) and list the owner + date for the first step.
Here’s the sample 2-pager for our reports dashboard example.
Design document
Once the decision is made, the design document explains your execution plan.
Here’s the structure:
Context: A short paragraph answering “Why now?” Tie back to the PRD metric and any deadlines (seasonality, partner launch).
Proposal: How you’ll do it (one paragraph + simple diagram).
Alternatives: What you considered + tradeoffs.
Risks and mitigations: Top 3 risks with the mitigation you’ll ship (rate limits, step-up auth, feature flags).
Rollout and guardrails: Sequencing, flags, sample telemetry, and rollback steps.
Open questions: What’s unknown, who owns answering it, and by when.
Keep your design doc to two pages. The decision should be obvious on page 1. Extra details go in appendices/links.
For the our reports dashboard example, the design doc spells out the cache key (tenant + role + report + version), pre-render cadence, invalidation strategy, SLOs and alerts (TTFB, cache hit rate, payload size), feature flags/rollback, and the exact alternatives we considered but parked.