Part-time or full-time virtual assistant? How to choose the right arrangement

Independent outsourced-service working aid. Adapt to the actual agreement; not a universal legal contract.

Work covered and required finished result:
Observed request volume and measurement period:
Estimated active work, with uncertainty noted:
Service windows and named time zone:
Response target versus completion target:
Input cut-off and required information:
Requests that may wait until the next window:
Urgent exceptions and their decision owner:
Included capacity and billing period:
Usage warning and extra-work approval route:
Unused-hours rule and expiry:
Planned absence, outage and cover arrangements:
Evidence reviewed before increasing the scope: