Engagement on an hourly basis for an agreed number of hours. Suitable for ongoing support, consulting, and tasks with difficult-to-predict scope.

• Agreement on an hourly budget (contracted volume in hours)
• Billing based on actual hours worked
• Monthly time report with activity log
• Unused hours do not expire — carried forward to the next month or credited
• Flexible adjustment of the budget by mutual agreement

Engagement for a precisely defined, self-contained deliverable. Suitable for development projects with a clearly describable result and defined milestones.

• Clear target definition and scope description upfront
• Division into stages (milestones) with agreed partial payments
• Payment tied to acceptance of each milestone
• Final acceptance and final payment upon complete delivery
• Changes to scope are treated as a separate follow-up order