Working capital is that portion of (long-term) capital invested in current assets. The working capital cycle can be defined as "money tied up in the business and used to finance its day-to-day needs, such as buying raw materials" (Clark, P. et al., 2009, Business and Management Course Companion, page 149, Glasgow, U.K., Oxford University Press). In the case of RDB, the working capital cycle includes money spent to buy raw materials (eg steel) which then becomes (unsold) stock (eg ball bearings);
when the stock is sold, consumers (debtors) pay for it (sometimes after a slight delay expressed in debtors days) and cash is returned into the business (to pay for new raw materials from suppliers as well as workers' salaries etc). Having factories in Brazil, China and India would mean that the customers based there would receive the goods more quickly (without delays due to distribution and delivery). This could ensure prompter payment which, in turn, could result in a faster purchase of new raw materials to produce more ball bearings (a sort of virtuous circle). Utilizing working capital more effectively is actually an internal source of finance that also enables the company ( RDB in this case) to manage its stock better. Just as the Japanese companies adopting just-in-time (JIT) production in the 1970s (as mentioned in the case study), RDB could also consider that approach in order to further shorten the working capital cycle in its new, flexible factories.
A full definition of working capital is not necessary to explain the importance of the working capital cycle, though some candidates may offer a definition. What is important is that candidates convey an understanding that, with factories around the world, both inventory turnover and debtor turnover may contract. When that occurs, RDB will be able to divert some of its long-term capital away from short
term needs and, possibly, use it more productively (use funds generated by the contraction of working capital as an internal source of finance).