Introduction
Provide stakeholders with a realistic expectation of when they can expect delivery of a release. The chart clearly shows that there are two key variables that determine the ‘Landing Zone’ for a project; The Scope and the Throughput rate (velocity). Showing the business that they can directly influence the delivery dates is a key part of engaging them in collective responsibility for project deliverables.
From experience the rate at which Scope continues to grow is a real surprise for most teams - increasing awareness of this fundamental aspect of a project is key to influencing the outcomes.
The chart is so simple to comprehend that many clients use it to report up to the highest level stakeholders in the organisation.
Project Data Settings[edit]
Selecting the data
Select the project, version(s) and component(s). Decide which Issue types you want to include - and hit load.
<image>
Chart Settings
Having loaded the data you can refine some of the key parameters of the chart. All of these settings are saved with the chart and therefore only need to be done once for a project or release.
Field | Description |
---|---|
Data interval | Select the frequency you want to sample the historical data - in days |
Date range | Choose the start date of the chart. The end date will default to 'today' and roll forwards - unless you fix it with a specific date |
Done States | Decide which states represent 'Done' for you team. This will be used to work out the lower red throughput line. |
Manual Throughput | You may want to override the calculated historical throughput rate e.g. in the early stages of a project, before the team's throughput has stabilised. You can enter a value here of the number of effort points the team is expected to finish per interval (as set above) |
Manual Range | Use this to set the spread of the forecast optimistic and pessimistic lines (if you have used the manual throughput rate). You can set the Standard Deviation manually, e.g. if you don't yet have enough history to calculate the SD. This number will then be used to draw the optimistic and pessimistic forecast lines. |
Estimated Size | The chart calculates average item size based on history and uses this for all unestimated items You can override this with an estimated size |
Hide and apply chart settings | This will do a reload based on your new chart settings - and then hide the data selection panel. |
Hide settings | Hides the panel without reloading the data |
Field | Description | |
---|---|---|
Throughput Settings | ||
Sample | Choose how much of the project history you want to include to calculate the mean throughput rate (velocity) '75%' will use the last 75% of sample interval velocities to calculate the mean | |
Optimistic | Optimistic will calculate the higher throughput rate, as a standard deviation from the mean. 15 will provide 0.15 standard deviations from the mean | |
Pessimistic | Pessimistic will provide the lower throughput rate, also using standard deviations from the mean. | |
Scope Growth settings | ||
Sample | Choose how much of the project history you want to include to calculate the mean Scope growth rate '75%' will use the last 75% of sample interval velocities to calculate the mean | |
Upper | Determines the rate at which the rate of scope growth slows down. So, 10% means that each interval (set above) the rate of growth is reduced by 10%. The same is applied to subsequent intervals, until the rate of growth is 0% | |
Lower | As above - however this determines the lower scope forecast. If this is set to 100% then it gives a straight line. |
Display Options
These are not saved to the database but are personnel preferences as a user is looking at a chart.
Show Count/Effort | This enables you to toggle between Count of the number of items or the total effort - on the Y axis |
Show/Hide unestimated items | Toggles between showing/hiding the number of unestimated items in the backlog. |
Show/Hide bugs | Toggles betweeen showing/hiding the number of bugs in the scope backlog |
Hide Title data | Hides the table that summarises what settings were selected in the creating of the chart |
Data x days old - refresh | In order to speed up this chart we cache the last saved version of it. This could have been several days earlier. Click this button to refresh the data in the chart. |
Interpreting the output
Add Comment