GANTT

task bars on a period grid with done-overlay, milestones, today line. Needs: tasks with start/end in axis units + optional done_to and milestones + a today position.

scheduleprogress

DL-01 AGRAW

Use when

schedule communication: 4-10 tasks against a period grid
showing done vs remaining per task plus the critical milestone

Do not use when

full CPM networks with dependencies (planning software, not a slide)
more than ~10 rows (summarize to work packages)

See instead

only dated moments matter: CH-TIM-15

Alternatives

CH-TIM-15 (moments, not durations)
CH-TIM-02 (overall progress vs plan)

Rules

bars muted, done-portion overlaid in primary
milestones are diamonds in ink; the today line is negative, dashed, labeled
tasks in schedule order, never re-sorted
10 tasks maximum

Never do this

rainbow bars per task
fake dependency arrows crisscrossing
percent labels on every bar (the overlay shows it)
3D bars

QA before delivering

start < end and done_to within [start, end] on every task
today line present and labeled
tasks <= 10
title names the driver with a date
source present

Data shape

title	action title naming the driving task or date
eyebrow	caps, DL chrome only
source	bottom-left always
axis	{labels: [period names]}; task units are fractional axis positions
tasks	array of {label, start?, end?, done_to?, milestone_at?}
today	axis position of the status date

Sample data (golden)

{
  "title": "Loop tests drive the path to RFSU on 30 November",
  "eyebrow": "SCHEDULE . JUL-DEC",
  "source": "Source: sample dataset v1, 2026-07-12",
  "axis": {
    "labels": [
      "Jul",
      "Aug",
      "Sep",
      "Oct",
      "Nov",
      "Dec"
    ]
  },
  "today": 2.4,
  "tasks": [
    {
      "label": "Pre-commissioning",
      "start": 0,
      "end": 3.5,
      "done_to": 2.2
    },
    {
      "label": "Energization prep",
      "start": 1,
      "end": 2.8,
      "done_to": 2.3
    },
    {
      "label": "Loop tests",
      "start": 2,
      "end": 4.6,
      "done_to": 2.4
    },
    {
      "label": "Punch clearing",
      "start": 3.2,
      "end": 5.2
    },
    {
      "label": "RFSU",
      "milestone_at": 5
    }
  ]
}