Regarding sales order

Hi,

Can anyone here explain what is the meaning of sales order type?

it would be better if u could explain the cycle of sales order. i mean to say who will create the SO, ( whether customer requests it or we will create on basis of customer request ) who will be effcted with the SO? ( i mean depending on SO , one will generate production order? and depending upon the production, purchase order created?

i am really not sure what are the effects and what is the correct flow.

can any one here explain me the correct flow and effects of SO creation?

last, how the customer and firm can start the communication when it is for the first time?

Thanks,

Ravi