The duration value is only an estimate. The optimizer uses XSS (l, h and p) during the optimization process. If you specify a duration, it constrains the XLSS rate of the low or high intensity activity to 60 per hour.
Flex means to allow the XSS to increase progressively. Fixed means to constrain XSS to the specific duration. Fixed is likely what you’ll use for schedule restrictions.
As of yesterday, I cannot find any workout available in the planner even though there are planned activities. I have not activated any filters.
When I use Adapt Forecast it looks like previous days (i.e. days before today) are included in the plan, while if I use Goals → Run Forecast AI it always starts on today.
Is there are (good, end-user centric) reason for the difference? And is there a problem of using Goals → Run Forecast AI instead of Adapt Forecast except it being slower? I assume the first one will produce a better adapted plan because it allows for more changes.
Surely forecast AI is intended to define a new plan from scratch whereas the adapted forecast amends an existing plan already set which explains why it includes rides from the start date of the plan.
Today is planned as a rest day in my calendar, which means training is optional. I get a training advice saying that I can train, but should make sure I do not become too tired.
Could it be possible for Xert to indicate a max XSS number that I can do without given that I have a high intensity session tomorrow?
I’d read this as – Yup, I’m taking a Rest Day especially since a long HIIT ride is recommended for tomorrow.
5 XSS if you really want to ride. 
Okay, I did a 205 XSS in 180 min. Let’s see how my VO2Max workout will be tomorrow 
@xertedbrain Would it be possible to show the availability (number of hours) on in the planner each forecast item? It would be nice to see this without having to open the availability setting for each item. Then it also becomes easier to see if it makes sense to adjust some availability constraints.
For the item below you could show “(3h 30m)” or “Max 3h 30m” under “3h 21m” to indicate the availability. If unavailable, you will show “Unavailable”, 0h, or 0m.
It would be nice to see this for Rest and Recovery days as well. Currently you cannot see if the rest day is due to unavailability or just because you are ahead of the plan.
@xertedbrain One more feature request. Can you please add support for Up, Down, Page Up, and Page Down keys in the planner?
If you want to support some more keys, here are two other proposals:
Were you able to keep the target date the same as what you had set for using the AI Forecast? I’m considering tapping out. I’m overwhelmed with all the new jargon and I just want to get back to basics: at least the basics I knew (sort of) before.
Target Date is a function of Goal, Event, and 120 Day Program (the version of XATA you are used to).
You can flip back and forth testing an FAI plan and the 120 Day Program at any time.
Select Program, Target Type, and change to 120 Day Program with same target date.
When you select Save a warning will appear that your forecast will be removed.
You can switch back to an FAI goal or event as well.
I’ve switched modes several dozen times now while testing various FAI options but I’m primarily following an FAI Goal plan with a target date of March 31.
Thanks for that. Good to know I can go back and forth.
