Begin with the work, not the catalog
A long module list is a poor starting point for an implementation. Ask which processes cause the most friction, which records need to be shared, and which teams are ready to change how they work. Use those answers to define the first phase.
Understand dependencies
Inventory depends on clean product and location records. Procurement needs consistent vendor information and approval responsibilities. Finance needs agreed account structures, tax treatment, and opening balances. A module that looks self-contained may still depend on groundwork elsewhere.
Build a practical sequence
Map requirements to modules and identify the smallest useful combination. For a distributor, purchasing, stock, sales orders, and finance may need coordinated planning. For a services business, projects, timesheets, and billing may be more urgent. Avoid adopting a sequence simply because it worked for another company.
Define the first release clearly
Write down included workflows, exclusions, migration scope, acceptance criteria, and training needs. Keep later ideas in a separate roadmap. After launch, review the quality of records and actual use before extending the system.