Staffing a small company correctly is one of the key challenges business owners face, according to Entrepreneur magazine. Manpower impacts everything from production to client relationships, so managers pay careful attention to the number of workers a business engages at any given time. The importance of manpower is best understood by looking at its benefits in depth. The link between manpower and company projects is fairly simple: Manpower is proportional to productivity. The more people are available to work, the faster projects can be completed or the more projects a company can take on. Conversely, a lack of adequate manpower prevents businesses from completing tasks. The lack of productivity translates into a reduction in revenue and profit, which in some cases means the business can't stay operational. Adequate manpower allows companies to keep the production and delivery promises they make. If companies do this, they can establish and maintain good client relationships. This can lead to additional sales. At the same time, keeping promises can prevent companies from having to pay fines and penalties, which keeps the amount of profit higher.