I have a strange bug with the Bigpicutre plugin and I believe it is related to how I configure my JIRA Task or Gantt SubTask
I will create some JIRA Tasks and Subtask from the Gantt Layout page and move the task to desired start dates as well as resize the task to the desired end date using the "double arrow" at the edge of the task.
I alight the task and sub-task to my likeing and I leave.
Issue: When I come back, sometimes my task have moved to different days then what I had set. Sometimes they will have changed in lenght (for example I have task over 4 days and it will randomly change to 6 days). Sometimes when I move the task back to the start date it originally it will automatically move all other subtask all over the place.
My process is a follow
1) Create JIRA task
2) place JIRA task on start date and resize task to end date
3) create Gantt SubTask while selecting the JIRA task.
This convers the JIRA task into a black bar and places to subtask under it.
4) Move the subtask to the start date and resize the end date
Repeat step 4 until all my subtask are added to the parent JIRA task and placed in their respective start/end date
What do I need to configure to lock the tasks so that they don't randomly move or resize themselves?
BigPicture features quite a few smart/automatic features, which could make some changes - of course you can disable all of them . As a rule of thumb, it is recommended to select "Manual" when creating a new Program if you want these to be turned off by default.
Each issue on the Gantt has two edges, left and right, representing its start and end date. The dates you specify in JIRA are simply imported, and hence once you just add a task it will appear where you tell it to. Now, moving this issue left or right changes the position of the start and end dates, so these are updated. Therefore the cause for date changes is actually the fact, that the issue was moved on Gantt.
This could happen if:
A) It was linked to another issue. Linked tasks have to follow certain relations dependant on the link type, and if you move one task, the linked one can very well be automatically moved to respect the given relation. More: Task Links#Auto-scheduling
B) You have the WBS synchronizers set in the Program settings. These automatically build a hierarchy based on what you choose (for instance, if you choose Project and Epic, everything will be sorted into Projects and then Epics). If WBS are on and a new task is added, it will be put accordingly to this structure and therefore may be altered by the mechanism. More: Gantt synchronization
C) The tasks or tasks that were changed were made sub-tasks of other tasks, and then the parent was moved or changed. Parent-child is a relation and children cannot take more or less time than the parent.
If the given task is on multiple Gantts (Programs), a change on any of those can result in the 3 reasons I have just mentioned.
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