For your customers, store, shop and app are one purchase. Inside the company they are separate processes with their own inventory and their own ownership.
Click & Collect therefore stands or falls on the question of which warehouse ships, who owns the stock, and what happens at the POS when the item isn't there. These are questions of organisation before they become questions of technology.
Working them out with you is the first part of our work. The second is building the platform where store, warehouse, shop and app come together.