The teams you are setting-up need to have way to deal with poor performer. Basis of performance is to measure against agreed-upon objectives and to have periodic reviews during course of year. If person's performance doesn't meet expectations, some communication will be required to get person back on track.
Problem: Working in setting of global team, how would you as HR Manager suggest team members to deal with performance problem? prepare number of the following items also issues you may add from own experience: who would speak to person - would it be individual or group; how would data be collected on poor performance; who would it be collected from - other team members, customers; who will monitor improvement?
describe how you believe this must be handled.