Description

MI ERP Gantt Open-Source Pro is a standalone, generic Gantt chart engine for Odoo 19, suitable for any module that needs to schedule activities — construction works, software projects, event planning, manufacturing campaigns. It ships a custom Critical Path Method (forward + backward pass) computed client-side, four dependency types (FS / SS / FF / SF) with lag and lead in working days, multi-baseline overlays, auto-scheduling of successors and a resource allocation histogram.

Round-trips schedules with Microsoft Project via the MSPDI XML format (2019+), captures PNG snapshots in one click and renders with rounded bars, amber project markers and red critical-path highlight in the MI ERP palette. Designed to be extended — sibling bridges connect it to BIM/IFC viewers, construction APUs and field-foreman PWAs.

Product screenshots

Real screenshots from the module running on Odoo 19 with seeded data, captured by the Playwright audit suite.

Gantt with Critical Path

Forward + backward pass computed client-side: every task on the critical path turns red. Rounded bars, DHTMLX-style header bands, amber project markers, FS/SS/FF/SF dependency arrows with lag/lead. Drag a bar — every successor reschedules respecting the working calendar.

WBS sidebar (Tabulator)

Hierarchical sidebar with WBS, name, start, duration and resources powered by Tabulator. In-cell editing, expand/collapse of summary tasks, multi-level indentation and a synchronized scroll with the chart.

Multi-project selector

List view of every Gantt project, with progress %, start/end and active calendar — switch contexts in one click.

Project form

Project header with calendar, baselines, currency and zoom level. Open the Gantt straight from the smart-button.

Settings dropdown

Ten Bryntum-style toggles: critical path, baselines, project lines, non-working highlight, cell editing, progress line, rollups, list-only mode…

Resource histogram (ECharts)

Stacked-bar chart of effective resource hours per day. Spot over-allocations at a glance and re-balance by dragging tasks.

Working calendars

Pre-loaded calendars for Spain, Colombia and Venezuela. Define your own with workdays + holidays — the auto-scheduler honours them.

Task editor popup

Inline editor with start, duration, % progress, predecessors, lag/lead and resources — no full reload between edits.

Core features

Why we are better than the paid alternatives

Presto and most construction ERPs depend on external Microsoft Project for the schedule, or embed the commercial Bryntum component. We bring the engine inside Odoo with zero runtime fees — vendored, audited and owned by you.

Companion modules (extend & conquer)

mierp_gantt stays domain-agnostic — every vertical adds its own bridge by inheriting mierp.gantt.task and mierp.gantt.project. None of these are required to use the Gantt on its own.

Typical workflow

Plan

1. Create the Gantt project, pick a working calendar (CO / VE / ES or custom).
2. Add tasks manually, paste from clipboard, or import from MS Project XML.
3. Link tasks with FS / SS / FF / SF dependencies and lag / lead in working days.
4. Snapshot the initial baseline so you can compare planned vs actual later.

Execute

1. Drag a bar — every successor auto-reschedules honouring the calendar.
2. Watch the critical path turn red live as the schedule moves.
3. Capture % progress in the task editor or the WBS sidebar (in-cell editing).
4. Review resource histograms to spot and resolve over-allocations.

Report

1. Toggle baseline overlay to compare planned vs actual.
2. Export back to MSPDI XML for stakeholders running MS Project.
3. Capture a PNG snapshot for status emails and weekly reports.
4. Enable bridges (construction, BIM, FM) to add domain context as needed.

Technical details

• Main models: mierp.gantt.project, mierp.gantt.task, mierp.gantt.dependency, mierp.gantt.calendar, mierp.gantt.baseline.
• OWL 2 component shipped under mierp_gantt/static/src/components/gantt_view.
• Critical Path engine: core/cpm.js — forward + backward pass with topological sort.
• Auto-scheduler: core/auto_scheduler.js — working-day arithmetic, FS/SS/FF/SF + lag/lead.
• MSPDI export: core/mspdi_export.js; import wizard parses the same format.
• BIM / IFC bridge hook: widgets/ifc_bridge.js — picked up by mierp_construction_gantt.
• Compatible with Odoo Enterprise and Community.
• Depends on: base, mail, web.

Vendored libraries (no CDN)

Requirements

Our Services

Customization Integration Installation

Build & Update Migration Support

Contact us

You'll get free assistance for 60 days for any issue or error.

For inquiries or support: [email protected]