Thanks for your advice.
I am searching for a software from open source to be used on factory. When a staff completing a purchasing or sales contract and saving the same to storage (file server), it will immediately notify his/her department head and relevant departments as well. The contract will be automatically sent to the seller or buyer concerned after a fixed time if no amendment made. At the same time it will notify the staff and all departments concerned promptly after its dispatch.
Any further help. Thanks