Linked Card Dates & WIP Control Features
We have just released two new features to VISUM
- Linked Dates
- WIP Monitoring
Take a card with due date of x. It’s start date is x minus process time (in working days) of that card on that board, y. That card’s child will have a due date of y, the start date of the parent card. So, the children “inherit” their due date from the parent. The start date of the parent card is only applying to its board. This is the due date of the child.
If user edits child card then he will see a notification about suggested due date
Now any new card created from this menu has its due date = today’s date
Your dates will stay together (linked) as long as the user does not change the date of the child card. Changing the parent’s dates will automatically change the children’s dates.
If you’re using the process step due dates in a child board, you’ll see a cascade through the various processes.
The purpose of WIP Monitoring is to improve the understanding of your lead times. If the amount of WIP is increasing, your lead times are increasing; conversely, if your WIP is decreasing, your lead times are also decreasing.
By monitoring your WIP you can see if you are producing faster than you are selling and vice versa.
We are monitoring:
- Total Cards in the System
- Quantity of arrivals (new work entering the system)
- Quantity of departures (completions)
The review of this report should be done on a weekly basis when you do your master schedule, or when you do your portfolio priority setting.
There are two parts to this feature, the report and the control chart. The report has all the raw data and the numbers. The control chart shows the trend over what time you have selected.
What you see in the above chart is that the dark green, the departures, has leveled off over the last couple of weeks, while the arrivals is staying at a steady rate. You have the two black lines, which are your trend lines. They are diverging. Work is arriving faster than it is departing. WIP is increasing. Your lead times are increasing. What you’re aiming for is parallel lines or convergence.
The action in the above situation is:
- Increase promised lead times
- Break the bottleneck (increase throughput)
The WIP Limit Adherence report will show you where the WIP is located.
In the example above, the histogram over the last 4 weeks tells you the steps leading up to PC check have all the work, exhibiting the classic symptoms of a bottleneck – blockage.