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A real-world education business rule
The Tennessee Department of Education's funding formula for its Basic Education Program (BEP) provides an example of a business rule in the field of education data. Consider the following information about how Average Daily Membership is structured in the Tennessee BEP:
| Component | Average Daily Membership (ADM) |
|---|---|
| Structural assertion | A student enrolled or receiving instructional service is included in an ADM calculation with the exception of the following:
|
| Action assertion | No student may earn more than 1.0 ADM. The formula for ADM is designed to handle part-time and vocational students accurately. ADM for vocational students must be calculated separately for each vocational program in which the student is enrolled. Formula used to calculate ADM is: |
| Derivation | ADM = ∑ [Days Scheduled * Time Scheduled ÷ Standard Day] ÷ Report Period Days |
| Additional structural assertions |
The symbol "∑" means "sum of all values for the equation between the [brackets]."
If the student's time scheduled and standard day never change during the report
period, the formula inside the brackets needs to be calculated only once.
Days Scheduled is the number of days a student is enrolled with a particular Time- Scheduled during a report period. (See note below.) Time Scheduled is the lesser of, either the total number of minutes, excluding lunch, a student is scheduled for classes for the school day; or the Standard Day. (See note below.) Standard Day is the length in minutes of a standard, full-time day of instruction, excluding lunch, for all students, regardless of whether they are enrolled full-time or part-time. (See note below.) Report Period Days is the number of days covered in the report. Standard report periods are 8 successive, 20 instructional-day periods; a ninth period, which may be 20 instructional days or less; and the full school year, which may be 180 instructional days or less. A full-time student is a student whose amount of time receiving instructional service is greater than, or equal to, the amount of time specified in the Standard Day. A part-time student is a student whose amount of time receiving instructional service is less than the amount of time specified in the Standard Day. NOTE: For full-time students, and for schools that do not have part-time students and do not schedule students into individual classes, such as elementary schools, Time Scheduled equals Standard Day. |
