What Is a System of Record for Decisions?

A system of record for decisions is the one place where a team keeps what it decided, who made the call, why that option won, and whether the decision can be reopened. When a chat thread, a meeting note and that record disagree, the record wins.

Most companies already run a system of record for everything else. Code lives in GitHub. Work items live in Jira or Linear. Customers live in a CRM. Documents live in Notion or Confluence. The decisions that shape all of those things usually live nowhere in particular. They get made in a meeting, confirmed in a thread, and then they fade. This guide covers what a decision record needs to hold, where it should live, and the practices that keep it useful: logs, authority maps, RFCs and audit trails. Each section links to a full guide.

What "system of record" means

In IT, a system of record is the single source that wins when two systems disagree about a piece of data. Your billing system, not a spreadsheet someone exported last month, is the system of record for what a customer paid.

Applied to decisions, it means one agreed place for the answer to "what did we decide?" Everything else (chat, email, meeting notes) counts as discussion around the decision, not the decision itself.

System of record vs source of truth

The two terms are close, and people use them loosely. A system of record is where a piece of data is created and owned. A source of truth is the place everyone agrees to trust when they need the answer. For decisions, the two should be the same place. If the decision is written in one tool but people check a different one, you have two sources and no truth.

Why a wiki is not enough

A wiki can hold decision pages, and many teams start there. The trouble is that a wiki is a document store. Nothing in it marks a page as settled, nothing prompts anyone to write the page when the decision is made, and nothing tells a reader that a newer decision replaced it. After a few months, people stop trusting the pages, and the wiki becomes one more place to search.

What every decision record needs

A decision becomes a record, rather than a memory, when it can stand on its own. A reader who was not in the room should be able to answer five questions from it:

1. What was decided, written as a result, not a discussion.
2. Who made the call, and who was consulted or disagreed.
3. Why this option won, including the options that lost.
4. When it was decided, and when it should be looked at again.
5. Under whose authority, and whether it can be reversed.

The last point is the one most teams skip, and it is the one that stops arguments. It tells the next person whether the question is settled or still open. Leave it out, and any decision can be reopened by anyone who missed the meeting.

The cost of decisions nobody wrote down

Undocumented decisions do not cost much on the day they are made. The cost arrives later and in small amounts, so nobody adds it up. A new hire asks why the team chose one database over another, and two senior engineers lose an hour reconstructing the answer. A settled question comes back at the next planning meeting because the person who decided is on leave. A teammate builds on an assumption that was reversed in a thread they never saw.

The worst case is when the person who made the call leaves the company. Their reasons leave with them, and the team is left with a decision it can neither defend nor safely change. Writing down the "why" while the decider is still around is the cheapest insurance a team can buy.

Decisions spread across tools

Part of the problem is that decisions get made in every tool at once. An architecture call happens in a pull request review. A scope change happens in a Jira comment. A pricing choice happens in a Slack thread. Each tool holds a fragment, and none of them holds the decision as a whole.

You do not need to move all that discussion into one tool. You need the result of each decision written down in one place, with a link back to where the discussion happened. The discussion can stay where it was. The record is what people look up.

What to look for in software for recording decisions

If you are choosing a tool, test it against these points before you test the features:

• Can a decision be written in under five minutes, at the moment it is made?
• Does each record show who decided and under what authority?
• Can a record link to the ticket, pull request or deploy it affected?
• Does a newer decision visibly replace an older one, so readers see which is current?
• Can someone outside the team find the answer without knowing where to look?

A tool that fails the first point will be empty in a month, no matter how good the rest is.

Keep a decision log

A decision log is the running list of decisions a team has made, one row per decision, in date order. It is the simplest form a system of record can take, and for most teams it is the right place to start. The format matters less than the habit: one owner, one place, and a rule that a decision is not final until it is in the log.

Our decision log template for engineering teams covers the fields to include, a filled-in example, and the reasons most logs go stale within a quarter. The short version of the template is at the end of this guide.

Write a decision record for the bigger calls

Some decisions need more than a row in a log. A choice that took weeks of debate, affects several teams, or will be questioned later deserves a short document: the context, the options, the reasoning and the result. That document is a decision record.

A team decision record brings the same idea that engineers use for architecture to business decisions such as pricing, hiring plans and go-to-market changes. It also explains the difference between a log and a record, and when you need each.

Record architecture decisions as ADRs

An architecture decision record (ADR) is a short document that captures one technical decision, its context and its consequences. ADRs usually live in the code repository, next to the code they explain, so the reasoning travels with the system.

Our guide to architecture decision records and the tools for them covers what an ADR contains, when to write one, and how the common tools compare.

Map who decides what

A record says what was decided. An authority map says who is allowed to decide in the first place. Without one, decisions stall while people wait for someone who might have the final say, or they get made twice by two people who each thought it was theirs.

A decision authority map lists the main types of decision your team makes and the one person who owns each. It is the companion to a decision log, and it is often the faster fix of the two.

Name one owner: DRI and RACI

A directly responsible individual (DRI) is the one person who owns a decision or a project and answers for the result. RACI is an older model that spreads the roles across responsible, accountable, consulted and informed. Both try to answer the same question: who owns this?

The guide to the directly responsible individual model explains how a DRI works, how it compares with RACI, and what happens when the DRI is away.

Use an RFC process for decisions that need input

A request for comments (RFC) is a written proposal that others review before a decision is made. It suits decisions that need input from several people but should not need a meeting. The RFC becomes the record once the decision is made.

See how to run an RFC process in an engineering team, including a template and a clear way to close each RFC with a decision.

Match the effort to how reversible the decision is

Not every decision needs a full record. A choice you can undo next week needs a line in the log. A choice that is expensive or impossible to undo needs a written record, the right decider and a slower process.

Sorting decisions this way speeds up the small ones and protects the big ones. Our guide to reversible vs irreversible decisions shows how to tell them apart and how to document each kind.

Stop re-arguing settled decisions

When the same question comes back every quarter, the cause is rarely the decision itself. Usually the reasoning was never written down, the authority was unclear, or the people reopening it never saw the result.

The guide on why teams keep re-arguing decisions covers the common causes and how to write a decision so it holds.

Make decisions across time zones

Distributed teams face an extra problem: by the time one office wakes up, the other has decided something in a thread they will have to piece together. Decisions get lost overnight, or they wait a full day for someone to approve them.

The fix is a clear handoff for decisions: what was decided, what is waiting on whom, and who can decide while the owner is offline. See the decision handoff process for remote teams.

Put the practices together in a framework

Logs, authority maps and review cycles work best when they fit together. A decision governance framework is the short set of rules that says which decisions need which process, who owns each type, and where the results are kept.

Our guide to building a decision governance framework walks through a version small enough to adopt in a week.

Keep an audit trail

For some decisions, you need more than the result. You need the history: who proposed it, who approved it, what changed and when. That history is an audit trail, and regulated teams, security reviews and post-incident reviews all depend on it.

The guide to building a decision audit trail covers what to record and how to answer "who approved this?" months later.

A decision log template you can copy

Paste this table into a doc, a Notion database or a spreadsheet. Add one row each time a decision is made, in the same week it is made.

Field	What to write	Example
ID	A short number for linking	D-042
Date	The day the decision was made	2026-10-06
Decision	The result, in one sentence	Move the billing service to Postgres 16 in Q1
Owner	The one person who made the call	Maria Lopez, staff engineer
Consulted	Who gave input, and who disagreed	Platform team; Sam disagreed on timing
Why	The main reason this option won	Ends support risk on the old version
Options rejected	What else was on the table, and why it lost	Stay on 13 until Q3: too close to end of support
Reversible?	Easy, costly, or no	Costly
Authority	Whose remit this falls under	Platform lead
Review date	When to look at it again	2027-04-01
Links	Thread, ticket, PR or doc	RFC-17, PLAT-883
Status	Active, or replaced by a later decision	Active

Two rules keep the log alive. First, one person owns it and checks each week that last week's decisions are in it. Second, when a decision changes, add a new row and mark the old one as replaced. Never edit history.

Where StandIn fits

StandIn is a personal knowledge base, built on the work that you already do, that answers your teammates when you're away, in chat and email. When a team runs on StandIn, anyone can ask what shipped, what's blocked, and who owns a call, and get an answer sourced to the person who did the work. Decisions people wrote down stay findable, with the decider's name and a source under every answer. When the answer is not in the record, it never guesses: it says so and points to the person who knows.

See how that works for engineering leaders.