A RACI matrix defines who does what. A Gantt chart defines when. Learn how to combine both tools to eliminate accountability gaps and keep your project on schedule.
A RACI matrix without a Gantt chart tells you who's responsible for what but not when they're supposed to do it. A Gantt chart without a RACI matrix tells you when tasks happen but not who specifically is accountable for each decision point.
The gap between them is where projects fail.
A task might appear in your Gantt chart as "User acceptance testing — 5 days." But the RACI question is: who Approves the UAT results? Who needs to be Consulted before sign-off? Who gets Informed when testing is complete? Without answers to these questions, the task finishes and then sits in limbo waiting for a decision that nobody knew they needed to make.
Together, RACI and Gantt charts create a complete accountability system: what happens, when it happens, and who is responsible at each stage.
RACI is an acronym for four roles:
Responsible (R): The person or people doing the work. Every task must have at least one R. More than two or three Rs on a single task creates diffusion of accountability.
Accountable (A): The single person who owns the outcome. Only one person can be A per task—if multiple people are accountable, nobody is. The A person delegates to R people but answers for the result.
Consulted (C): People whose input is needed before the task can be completed. Two-way communication—they give input, and you incorporate it. These create dependencies: you can't mark a task done without consulting the C stakeholders.
Informed (I): People who need to know the outcome but don't need to participate. One-way communication—you inform them, they don't need to respond.
List your project's key deliverables or decisions on one axis, and your project roles (not individual names—use roles so the matrix stays valid when people change) on the other.
For a software product:
| Deliverable | Product Manager | Tech Lead | Designer | QA Engineer | Sponsor |
|-------------|----------------|-----------|----------|-------------|---------|
| Product requirements | A | C | C | I | A |
| Architecture design | I | A | I | C | I |
| UI design | C | C | A | I | I |
| Development complete | I | A | I | C | I |
| QA sign-off | C | C | I | A | I |
| Launch approval | C | C | I | I | A |
Two things to check: every row has exactly one A, and no column is entirely empty (if someone has no RACI for anything, they shouldn't be in the matrix).
Once your RACI matrix is built, map it to your Gantt chart in gantt-chart.io:
Step 1: Assign the Responsible role to each task. Every Gantt task should show who is doing the work. This is your R from the RACI matrix, converted to a specific person's name.
Step 2: Add Accountable as task owner. The A for each deliverable should be noted in the task details. This person is the escalation point if the task is at risk.
Step 3: Build Consulted dependencies into the timeline. If completing a task requires consulting three stakeholders, that consultation time should be reflected in the task duration or as a separate preceding task. Don't schedule a 2-day task and then discover that getting the required input takes an additional week.
Step 4: Plan Informed notifications at milestones. When major milestones complete, your Gantt chart should trigger a communication step: notifying all I stakeholders of the outcome. Build this as an explicit task or as part of your milestone definition.
Multiple Accountable owners. When two people are both A for a decision, neither acts with urgency. When the decision stalls, each person points to the other. Fix it: every decision has exactly one A.
Consulted stakeholders not in the task timeline. A task is marked complete before its C stakeholders have weighed in. Their feedback arrives late and requires rework. Fix it: make C consultations explicit task dependencies.
R without authority. The Responsible person doesn't have the access, budget, or authority they need to complete the task. Fix it: the Accountable person must ensure R has what they need before the task starts.
RACI created and never referenced. The matrix gets built in kickoff week and then sits in a document no one opens. Fix it: reference the RACI at every status meeting when a task owner or decision point is unclear.
When a task is stuck, the RACI matrix tells you exactly who to go to:
This eliminates the common blocker pattern where a task sits in a state of "waiting for someone to do something" without anyone specifically responsible for the next step.
RACI Matrix:
| Deliverable | Campaign Manager | Designer | Copywriter | Marketing Director | Legal |
|-------------|-----------------|----------|------------|-------------------|-------|
| Brief | A | C | C | I | I |
| Copy | C | I | A | C | C |
| Design assets | C | A | C | I | I |
| Legal review | I | I | I | I | A |
| Campaign launch | A | I | I | A | I |
Gantt Chart (in gantt-chart.io):
The RACI tells you who needs to be involved in legal review (Legal is A, Campaign Manager and Copywriter are I). The Gantt chart tells you legal review happens in Week 3 after copy and design are done.
Neither document alone gives you the complete picture.
When team members change, update the RACI matrix. When a new task is added to the Gantt chart, add the corresponding deliverable to the RACI matrix and assign roles.
Both documents should be accessible to the whole team—share the Gantt chart from gantt-chart.io and the RACI matrix from your project wiki or shared folder. When accountability questions arise during the project, both documents should be the first reference.