The Area being Modelled is :-
Services Job Scheduling


Recurring Job Scheduling Data Model
Question: Hello, I am trying to develop a database model for a lawn service (or any other service based industry). 
I am having problems developing a scheduling system. 
Some of the requirements include: Jobs can be recurring, on any schedule. Example: daily, weekly, monthly, once, 
or any other schedule. 
Job schedule can change over time. 
Example: in March a recurring job may recur monthly, while April through September the job may recur weekly. 
Jobs can be scheduled by what day they need to be completed. 
Example: Mondays every other week. 
Jobs may have a certain number of times they need to be completed. 
Example: Job 1 needs to be done 52 times in one year. 
Jobs may be rescheduled due to any reason. 
Example: Job1 pushed back 1 day due to rain. 
I just can’t seem to wrap my mind around how to achieve these goals. 
Any suggestions? 

Barry says :-
A. The Things of Interest include
A.1 Changes
A.2 Schedules
A.3 Services
A.4 Others to be determined
B. What do we know about The Things of Interest ? 
B.1 Others to be determined