Depending on client needs and situation the engagement model would typically be one/many of the following:
Launch discussion with stakeholders to understand current situation and define need
Study of 'as is' situation, setting of baseline and preliminary view on Improvement opportunities.
agreement on what, when, where.
Development of a strategic plan to drive improvements – budgets & timelines
Identification of champions, teams. Deployment support and progress monitoring
Periodic stakeholder reviews of progress
periodic health check