Integration complexity
Legacy environments are connected to more systems than the programme plan usually accounts for. CRM, workforce management, quality, reporting, telephony, and back-office integrations often reveal complexity only once delivery begins.
Data, MI, and readiness
Data migration, reporting alignment, agent training, supervisor readiness, process redesign, and change adoption all take longer when the original plan assumes technology readiness is the same as business readiness.
Governance makes delay visible
Good governance does not remove complexity. It makes it visible early, attaches ownership, tests supplier assumptions, and protects the critical path before slippage becomes accepted.