Quality of each activity being performed must be carefully monitored and controlled to ensure its compliance with standards agreed to by clients and organizers.
Organizers should examine whether the service provided by an external service provider is in line with what was agreed to in the contract
Any changes in plans can affect the budget and costs. So, organizer need to control costs by:
Determine changes in the estimated budget
Manage actual changes and take necessary corrective action
Inform appropriate stakeholders to authorize changes