Understanding availability

Assume a fixed have a sequence with a ramp up, a run, and a ramp down. The handle of the sequence points to the Run Time

15M
1H ç = (handle)
15M

We need rules about what availability means. Here are mine.

1)
Availability (as far as start) refers to the indicated interval only. If the availability begins at 9:00, then it is acceptable to receive a request at 9:00 (rather than at 9:15). Intervals before the Indicated Interval must be ignored for availability. (Principle of Minimal Knowledge).
2)
I want to say the indicated Interval must fit w/I the Availability. If the availability ends at 11:00, then a start time as late as 10:00 is acceptable. Let’s look at another case

15M
() ç = (handle)
15M

3)
In this case the invoker must specifies Start and Run Time (duration). If the availability is (9:00 to 11:00), then (9:00 – 1H) , (10:00 – 1H) (9:30 – 1H15M) are all acceptable. (10:00 – 2H) is not.

These rules feel pretty good for one scheduled interval. Let me try to break them:

1H ç = (handle)
1H
1H
1H
1H
1H
1H
1H
1H
1H
1H
1H

Here we have 12 consecutive 1 hour intervals. This might be a schedule of prices. Availability does not seem as important with this, which is publishing prices, that may not have negotiable start times. Still, an availability of 9-10, for the 12 hours from 9-9 seems a little odd. I think I can live with it, though.

Comments?

tc

"If something is not worth doing, it`s not worth doing well" Peter Drucker
Toby Considine
Chair, OASIS oBIX Technical Committee  U.S. National Inst. of Standards and Tech. Smart Grid Architecture Committee
Facilities Technology Office University of North Carolina Chapel Hill, NC
Email:
Toby.Considine@ unc.edu
Phone: (919)962-9073
http://www.oasis-open.org
blog: www.NewDaedalus.com