I'm writing a practical guide for Australian SMEs on calculating warehouse space requirements. How do you typically estimate your space needs? What's a reliable formula for calculating space based on stock volume or SKU count? How does your business factor in peak season demand? When does it make more sense to use a 3PL over a fixed warehouse lease? At what point did you make the switch? Ideal sources include warehouse managers, operations managers, 3PL providers, and supply chain consultants.