Data Flow Diagram

[charliebing]

A purchasing department receives a purchase requisition from the stores. The requisition is checked, and an invalid requisition is returned to the stores for correction.
An order is made out using a file of approved suppliers and sent to the appropriate supplier. A copy order is filed. The requisition is filed.
When the goods are received, the invoice is compared with the filed order copy and an invalid invoice is returned to the supplier. Valid invoices are passed to the accounts department for payment and fulfilled orders are filed. Draw a DFD for the above.

[bobbinwales]

https://www.chegg.com/homework-help/questions-and-answers/system-analysis-design-purchasing-department-receives-purchase-requisition-stores-requisit-q81931485
Someone asking here too.

[Canary42]

Takes me back to my days as a database manager - good luck charlie.

[Tuvok]

Take each stage and workout the entry, action and result for each.

Each result will then be the cause for the next stage. eg

Entry -> action -> YES result and NO result.

Entry caused by YES -> resultant actions and results
AND
Entry caused by NO -> resultant actions and results (eg. loops back to Stores etc.)

etc.

[bobbinwales]

sounds like the sort of homework my great niece was doing in year 8 IT lessons last week
https://www.bbc.co.uk/bitesize/guides/z3bq7ty/revision/3