The purpose of this thesis was to find out the ways to improve a target organisation’s purchase order process. The problem of the target organisation was a lack of the control over purchases. Also, financial data of the target organisation is not accurate enough and suppliers’ invoices often are paid with delay. The target organisation does not use sufficiently purchase orders when ordering services, goods and/or materials which results in the above mentioned problems. The goal was to organize it so, that the target organisation starts to actively use purchase orders. It means that the number of incoming invoices from suppliers having purchase order number reference on the invoice should increase. The researcher’s role was to gather the rel...