Preferential access to a unique resource that drives value such as management, technology, patents, property, etc.
Entrant has a superior business model (lower costs and / or ability to charge higher prices given the higher product value) that incumbents cannot replicate without significant cannibalisation of existing business.
Value of the product increases as the user or customer base increases.
Operational and learning process that drives higher quality products and / or lower prices vs competitors.
Per unit cost declines as units produced increase. Scale economies also include procurement scale and distribution network density.
High financial cost and time of customers switching to a competitor. Includes productivity loss from downtime, changing routine, and retraining staff.