What-if scenario simulator for schedules · ScheduleSignal
See + Test · Gantt & What-If

Drag the bar. Watch the finish move.

An interactive Gantt — critical path, baseline overlay, WBS bands, four timescales — with a what-if mode that reschedules the whole chain through real P6 calendars as you drag.

The Gantt

Built for programme review, not slideware.

Critical path, in redthe driving chain, always visible
Baseline ghost barsapproved vs current at a glance
Data-date lineprogress cut where it belongs
WBS bandscollapse to the level you present
Four timescalesday, week, month, quarter
0.2–8× zoomorient fast, inspect close
Calendar depth — the differentiator

The engine reads each activity’s own P6 calendar — weekday patterns, holidays, even working exceptions like weekend shifts.

What-if mode

Move, stretch, link — rescheduled live.

Drag a bar and the whole chain reschedules through the CPM engine — existing FS/SS/FF/SF logic, lags and per-activity calendars honoured. Drawing a new dependency creates an FS link; loops are blocked; completed work stays locked. When the scenario wins the meeting, export the change-sheet and apply it in P6 or MS Project.

Projected finish +12d
Scenarios

Scenarios that survive the update cycle.

Each scenario is saved against the exact monthly update it was built on — next month’s XER doesn’t overwrite your thinking.

Named, saved per monthly update
JSON import & export
Custom fields — text, number, date, select
Change-sheet export back to P6 / MS Project
Calendar & Kanban

Also plan visually.

A Calendar month view with a working-time inspector, and a Kanban with WBS swimlanes. Dragging a card between status columns feeds the CPM projection — it isn’t just a board.

Next in the tour Trends, Comparison & Delay