Effective inventory control is important for cash flow because holding too much inventory ties up cash that could be used elsewhere in the business. Factors like late planning, overstocking discounted products, limited access to inventory data, and failing to adjust to trends can lead to poor inventory control and cash flow problems. Some causes of cash flow problems include seasonal fluctuations, late or non-payment from customers, high overheads, and bad debts. Solutions to improve cash flow involve auditing finances, freeing up assets, prioritizing credit control, negotiating supplier terms, and creating cash flow forecasts.