Step 1: Understand working capital.
Working capital is the capital required for day-to-day operations. It is influenced by various factors that affect the liquidity and operational efficiency of the business.
Step 2: Evaluate the options.
- The size of the enterprise impacts the working capital requirement as larger businesses generally need more working capital.
- The period of the manufacturing process determines how quickly inventory is converted into cash, affecting the working capital needed.
- Availability of raw materials also affects how much working capital is needed to ensure smooth production without delays.
Step 3: Conclude.
All these factors influence the level of working capital required by an organization.
Final Answer:
\[
\boxed{\text{All of these}}
\]