Deploying a machine learning model to production involves more moving parts than most software releases. You have data pipelines, training infrastructure, model validation, serving infrastructure, and monitoring—all with hard dependencies between them. A Gantt chart doesn't solve the statistics, but it does prevent the organizational chaos that derails ML deployments: teams working in the wrong order, staging environments that aren't ready when models are, A/B tests that start without a rollback plan.

This guide covers building a Gantt chart for an ML model deployment from data prep through production rollout.

Prerequisites

These decisions need to be made before you can build a meaningful timeline:

Problem definition locked. What is the model predicting? What's the success metric (accuracy, AUC, precision at K)? What's the baseline you're trying to beat?
Data sources identified. Which tables, APIs, or event streams feed training data? Who owns access to each?
Serving infrastructure decided. Batch scoring, real-time API, embedded model, or feature store + lookup? The architecture determines your deployment timeline significantly.
Retraining frequency. One-shot deployment or continuous retraining? Continuous retraining adds a monitoring and triggering row group to your Gantt chart.

Phase Breakdown

Phase	Key Tasks	Duration	Dependencies	Owner
Data Preparation	Data collection, cleaning, feature engineering, train/test split	2–4 weeks	Data source access granted	Data team
Model Development	Baseline model, experimentation, hyperparameter tuning, final model selection	3–6 weeks	Clean dataset available	ML engineers
Model Validation	Offline evaluation, bias/fairness checks, business metric alignment	1–2 weeks	Model candidate selected	ML + Product
Serving Infrastructure	Build inference API or batch pipeline, containerize model, integrate feature store	2–3 weeks	Model artifact ready	ML Ops / Platform
Staging Deployment	Deploy to staging, integration tests, latency benchmarks, shadow mode testing	1–2 weeks	Serving infra complete	ML Ops + QA
A/B Test Setup	Define control/treatment split, implement logging, set success criteria	1 week	Staging validated	Engineering + Analytics
Production Rollout	Canary deploy, A/B test execution, monitor metrics, full traffic shift	2–4 weeks	A/B setup complete	ML Ops
Post-Deployment	Monitoring dashboards, drift detection, retraining trigger setup	Ongoing	Model live	ML + Data

Step-by-Step Gantt Construction

Step 1: Split model development and serving infrastructure into parallel tracks

Model development (experimentation) and serving infrastructure setup can often run in parallel once the model architecture is decided. Serving infra doesn't need the final model—it needs the model interface (input/output schema). Parallelizing these tracks can save two to three weeks.

Step 2: Add a model validation gate before any deployment work

No staging deployment should start until model validation is explicitly complete. Create a milestone in gantt-chart.io after validation and make it the predecessor for both the staging deployment and serving infrastructure rows. This prevents teams from deploying a model that hasn't been validated against business metrics.

Step 3: Build the A/B test parameters as a task, not an afterthought

"Set up A/B test" is often one line in a project plan with no real tasks behind it. Break it into: define split percentage, implement logging for treatment/control, define success metric and minimum detectable effect, set test duration. Each is a trackable deliverable.

Step 4: Add a shadow mode row before live A/B testing

Shadow mode (sending production traffic to the new model but not using its output) is the safest pre-A/B validation step. Add it as a one-week row between staging and A/B test launch. It catches latency issues and logging gaps before they affect users.

Step 5: Set a rollback task in the production rollout row group

Your production rollout row group should include an explicit rollback task: the runbook, who executes it, and under what trigger conditions. Add this as a parallel task that must be complete before the canary deploy starts.

Common Mistakes

Treating "model training" as a fixed-duration task. Training a model involves experimentation, and experiments fail. Build in at least 20% buffer on model development duration. If the team says three weeks, put four on the Gantt chart.

No latency testing in staging. A model that scores correctly but takes 800ms per inference will fail production SLAs. Add latency benchmarking as an explicit sub-task in the staging phase.

Starting A/B test before logging is verified. Teams launch A/B tests and discover two weeks later that the logging was broken and they have no data. Verify logging on day one of the A/B test with a canary group of 1% traffic before widening the split.

No monitoring plan on the Gantt chart. Monitoring dashboards and drift detection are often built "after deployment" because they're not on the project plan. Add them as a final phase with explicit tasks and owners.

Template Example

A 14-week ML deployment Gantt for a recommendation model:

Weeks 1–3:   Data collection, cleaning, feature engineering
Weeks 2–5:   Serving infrastructure (parallel with weeks 2–3 of data prep)
Weeks 3–8:   Model development (experimentation → final model selection)
Week 8:      Model validation (offline metrics, business sign-off)
Weeks 8–9:   Staging deployment + integration tests
Week 9:      Shadow mode testing
Week 10:     A/B test setup (logging, split definition, success criteria)
Weeks 10–13: A/B test execution (canary → 10% → 50% → 100%)
Week 14:     Monitoring dashboards, drift detection, retraining triggers

Next Steps

Once your Gantt chart is drafted, walk through it with your data engineer, ML engineer, and ML Ops lead. The most common gap is the handoff between model development and serving infrastructure—make sure the interface contract (input schema, output format, model artifact location) is documented as a shared deliverable between those two tracks. Publish the chart and review it weekly. ML timelines slip most often during experimentation and A/B test analysis, so keep those rows updated in real time.