I am going to develop a accounting software of a production company.So it has 3 steps broadly.
1. Purchase raw material.
2. Processing and maintenance
3. Selling product
So, I need to draw an ER diagram which supports various payment methods ( Like Cash Payment, Bank Cheque payment, credit card payment, debit card payment, cash payment to a particular bank account etc) through which the company can payment to others (during step 1 and 2 ) as well as customer can pay to company ( for step3).
Can anybody have any idea or give some hints with sample.