Default: asynchronous
Written updates, attached files, decisions in the thread. This works in every timezone and leaves a record.
Scheduled overlap
Where a project needs live discussion, we agree fixed slots at the start rather than negotiating each week. Two half-hour slots per project phase is usually plenty.
Handoff notes
Every phase ends with a written handoff note: what is done, what is pending on us, what is pending on you. If you read one message per week, read that one.
What breaks
Projects where every decision needs a call. If your organisation cannot approve anything in writing, tell us at scope stage — it changes the timeline, not the possibility.