As you prepare for some rest and relaxation in the summer sun, supplier holiday closures are probably the last thing you want to think about. However, as entire workforces down tools to enjoy a well-deserved break, businesses further down the supply chain are left dangerously exposed to lengthy lead times, delays and even stock outs. Consequently, how much money should you invest in your inventory to cover this volatility? How much will this cost your business? And, exactly how long will your valuable working capital be tied up for?