Through a bank
Working capital covers current assets (receivables, inventories and work in progress). It can be increased by cash generated through operations and, if necessary, through bank loans.
Usefulness of cash-flow projections
Cash-flow projections – even if rudimentary – are important for correctly identifying working capital needs. If you take out a working capital loan, your working capital needs will be regularly reviewed and adapted in line you’re your company’s revenue trends.