Solution required for variable business rule

Question

Hi ,
I have a java object with some details as follow. Imagine the java application is a OT application. The object has details as follow.
startDate
endDate
startTime
endTime
and etc.
Based on their total ot hours , i need to provide them some allowances.
Like OT allowances , Meal allowance , Transport allowance etc.
Our old approch , we had configured everything using database to decide which allowance to be given. But it is not scalable.
If the client come up with new allowance list , it required to change program , and entire SDLC is to be done again.
My requirement is just need to play with total ot hours.
i can give some example..
if total_ot_hours is 5 hours Following allowances need to be given,
$12 Meal,
$5 Transport
5 times * Hourly Rate
For public holiday,
if total_ot_hours is 12 hours Following allowances need to be given,
$14 Meal,
$8 Transport
1 Day salary for first 8 Hours,
we have remaining 4 Hours, for that pay as follow,
4 times * Hourly Rate,
Like that the allowance list is growing.
What i have given is meant for the employee under one designation.
Certainly , it will vary for differnent designation.
Can we implement such requirement using Rule Enginee ?
is there any rule engine available ?
We think it is tough to setup everyting in table, based on that deciding allowance. it is like hard corded approch. not scalable.
Can you pls suggest me any idea ?
Thx !

Answer 1

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Can you pls suggest me any idea ?
Sure, do your own homework!