Clearly define the roles, responsibilities, accountability and levels of authority of staff and institute supervisory checks on their work.
Visit the site regularly and conduct frequent random spot checks to ensure the quality of the work and to detect irregularities.
Implement intensive controls if suspicious signs of irregularities are detected during spot checks.
Require subordinates to keep records of the inspections that are carried out.
Require subordinates to hand in regular reports on work progress, project management, quality control and matters that have an impact on costs.
Alert all staff that their work and decisions are subject to monitoring and spot checks that can be conducted at any time.