Version 26 (modified by anonymous, 12 years ago) (diff)


Scrum Burndown in Trac

Notice: This plugin is unmaintained and available for adoption.


A plugin to enable burndown chart capabilities, a common part of Scrum and other agile development methodologies.

Who's Using It

I'm interested to know how many people are using this plugin. If a lot of people are using it or at least evaluating it, I will be able to justify spending more time on it to my boss. If you download it, please increment this counter: 11

Installation Instructions

Installing this plugin is a five-step process.

  1. Add the 'integer' custom field type:
  2. Add custom ticket fields
  3. Install the egg
  4. Create a cron/pycron job to run a daily python script
  5. Add permission fields

Add custom ticket fields

Add the following to your trac.ini file:

burndown.* = enabled

orig_estimate = integer
orig_estimate.label = Original Estimate (in hours)
current_estimate = integer
current_estimate.label = Current Estimate (in hours)
time_spent = integer
time_spent.label = Time Spent

Original estimate is not really used by the plugin, it's just common Scrum process to be able to see how the estimates have change throughout a given sprint.

Installing the egg

Install just like you would any other Trac plugin. Drop the egg into your plugins or site-packages folder and then try to access Trac in your browser. You will get an error message saying that the database needs to be upgraded and telling you the trac-admin command to do it. (I think it's something like 'trac-admin YourProjectName.db upgrade'). Perform the upgrade.

Pycron/cron job

Download the this file: and place it into a directory where you can run it with python. For example,


Set up a job to run the script once a day. I personally am using Windows, so I used pycron. Here is an example pycron tab file to run the job at noon on weekdays: attachment:crontab.txt

This job totals up all the remaining time for given milestones and components and saves the information into the trac burndown table so that the plugin can use it to draw charts.

Assign Permissions

Assign permissions to users for 'BURNDOWN_VIEW' and 'BURNDOWN_ADMIN' The BURNDOWN_ADMIN permission gives users access to the 'Start Milestone' and 'Milestone Complete' buttons.

Using the plugin

At the beginning of a sprint, after the tickets have been inputted and estimated in Trac an admin user should click the 'Start Milestone' plugin. This inputs a datetime integer into the milestone table to indicate when the milestone was started. The daily script will only record hours_remaining entries for milestones that have started, but have not been completed. It should be fairly obvious, then, that an admin user should click the 'Milestone Complete' button at the end of the milestone to prevent the burndown_job from continuing to collect data.

You can view different burndown charts, selectable by milestone and component by choosing from the dropdowns and clicking the 'Show Burndown Chart' button.

In order for this to work, it is imperative that developers keep the current_estimate and time_spent fields up-to-date on the tickets they are working. At my company, if we add a new ticket in the middle of the sprint, we input 0 for orig_estimate so that we can track our estimating abilities at the end of each sprint.

Bugs/Feature Requests

Existing bugs and feature requests for ScrumBurndownPlugin are here.

If you have any issues, create a new ticket.


Download the zipped source [download:scrumburndownplugin here].

Download the distributable Python egg here.

Download the pycron/cron job here.

Download an example pycron crontab.txt file here.


You can check out ScrumBurndownPlugin from here using Subversion, or browse the source with Trac.

Recent Changes

16778 by rjollos on 2017-08-26 04:31:01
TracBurndown 2.0.0dev: Fix incorrect types for milestone timestamp columns

Fixes #13257.

13150 by rjollos on 2013-05-16 23:38:18
Fixes #11089:

  • Fixed incorrect package_data specification (regression from [13076]).
  • Renamed config.html to admin_burndown.html in order to better ensure that we'll meet the requirements that template names are unique.
  • Changed url in to point to the trac-hacks site.

Thanks to Jun Omae (jun66j5) for these fixes.

13148 by rjollos on 2013-05-15 23:40:27

Refs #7066, #11069:

  • Removed Trac pre-0.11 compatibility code.
  • Changed module names to follow Trac naming conventions.
  • Updated source file headers and added where missing.

Note: If you enabled the plugin through the web admin, or by providing the full module name, you'll need to re-enable the plugin or edit the [components] section:

burndown.burndown_admin_milestones.burndownmilestonesadminpanel = enabled
burndown.burndown.burndowncomponent = enabled


burndown.admin.burndownadminpanel = enabled
burndown.burndown.burndownmodule = enabled


Author: sambloomquist


  1. The link to add 'integer' doesn't appear to add integer custom type, am I missing something?? 2006/08/24)

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