Ariadne - Technical description
A240 |
Initialization Start intervals |
Description
This function initializes the start intervals of the events of the current competition on basis of measured start intervals of an archived competition. (Start intervals are required to calculate the time schedule for the current competition, which is done in function A250.)
The start intervals can be modified with a course correction factor, which expresses the difference in difficulty of the course of the current competiton, as compared with the course of the archived competition, from where the start intervals are initialized.A correction factor of 1.1 makes the start interval 10 % bigger.
Archived start interval are availabel per category. The start interval for an event of the current competition is the weighted average (weighted against the number of entries per category) of the categories which are put in one event.
Remark 1:
To determine the weighted average, in MS-Access 'statistical functions'
are required. A limitation of MS-Access is that when statistical functions
appear in a query, you cannot make an update query of it. For this reason
the start intervals, caluculated in Q087, are written to T400-Event with
a program loop in het class module ButtonInitialize_click.
Remark 2 :
Not for every category in the current competition will there be archived
start intervals.Categories which have no archived start interval, will
get a start interval of 0. Via other means an estimate of the start interval
has to be made.
Access path
 F000-Menu |
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 F401-Init-start-interval |
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Function structure
| Form | Control | Subform | Query | Table | Attribute |
| F401-Init-start-interval | Q100-Current-competition | T100-Current-competition | |||
| listbox CurrentCompetition |
Q100-Current-competiton | T100-Current-competition | |||
Dropbox ArchivedCompetitions Select |
Q105-Competitions-with-startintervals | T880-Start-interval T101-Slalom-competition |
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| button ButtonShowHist StartIntervals |
connects to: F080-Start-intervals |
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| button ButtonInitialize 2) |
Q087-Start-intervals 1) | Q507-Number-entries-per-category T880-Start-interval T450-Category-in-even |
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| button ButtonShowInitialized StartIntervals |
connects to: F400-Events |
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| button ButtonClose |
1) Q087 contains the calculated weighted average start interval for the current competition for each of the archived competitions available. In the class module of ButtonInitialize_click, only the start intervals for the competition specified in dropbox ArchivedCompetitionsSelect are selected.
2) Class module ButtonInitialize_click: First is T400!start-interval set to null. Then the weighted average start interval from Q087, selected by the value of the dropbox ArchivedCompetitionsSelect, and multiplied with the circuit correction factor is written to T400. The selected archived competition from where teh start interval was initialized, and the course correction factor are written to T100.
Change history
| date | version | change |
| 01-11-02 | 1.5 | Ariadne 4.1, text converted to html |