XTCE 1.3 RTF Avatar
  1. OMG Issue

XTCE13 — Is rangeForm specialization needed for Change and Multi band alarms?

  • Key: XTCE13-74
  • Status: open  
  • Source: NASA ( Mr. James Kevin Rice)
  • Summary:

    RangeForm now appears in Static, Change and the multi band. It's not clear these all make sense to me.

    In the static ranges – having the red be the most severe inner band and green "good" on the outside does make sense although I get the impression the use cases are less in number than the standard way folks think of limits. (you're going too fast! not – you're not going fast enough!)

    In the change alarm, which I think of mainly as deltas – again intuitively checking for big changes make sense. Unwanted big jumps are intuitive. But unwanted little jumps? That is big jumps are good? Is there a real use case – perhaps we can jam it into the annotation.

    Finally for the multirange alarm. The rangeForm is at each band. I suspect but don't know that this was to change the range set meaning...
    Intuitively "inside" would be something like this: [min, max] – where x is between them is "ok" ...

    And "outside" would be (-inf, min] and [max, inf) ... that is ranges point 'away'...

    But maybe not – who knows!? Given that though the default is "outside" when perhaps most would want it to be "inside" etc...

    I just wonder if we have done this correctly or its slipped through and is overly general because we inherited the various types, etc...

  • Reported: XTCE 1.2 — Thu, 3 Oct 2019 14:46 GMT
  • Updated: Wed, 9 Oct 2019 10:51 GMT