Introduction Opportunities as well as time are limited and therefore time in the process of identifying and exploiting opportunities matters. This basic principle of opportunity matters a lot in the business world and it determines the success and failure of a business venture. As Wickham (1998) explains in his strategic window metaphor, identifying a business opportunity is an important skill and this skill distinguishes managers and entrepreneurs. This concept implies that time is an important factor both in the identification and acting processes. Therefore, the window of opportunity in entrepreneurship is the limited time within which an opportunity should be utilized. After identification of the business opportunity, the next key step is to make a business plan that should be implemented. A business plan should be based on the potential of the opportunity and this determines the expected growth of the proposed business. The potential of a business opportunity determines how realistic the business plan is as compared to the other missed opportunities. This implies that the business plan should have a period as well as a geographical boundary that determines its scope. In addition to this, a business plan should be explicit on how to create new customers from potential clients. Secondly, the business plan should have a long-term projection on the expected growth and competitiveness. This paper presents a report on the viability of the proposed business opportunity presented as a business plan for a fast-food business venture in the United Kingdom. The paper, therefore, evaluates the viability of the proposed business by analyzing the available potentials and the expected growth in the business. The potential of a business is determined by the potentials identified in a business idea or by competence, attributes as well as skills. The paper, therefore, analyzes the potentials of the proposed business idea. Finally, the paper presents a reflection on experience resulting from studying entrepreneurship and business creation. Window Identification According to Harper (2006), an entrepreneur needs to consider the size and the action time on a business window of opportunity after the identification process. Harper goes on to state that the duration within which the window of opportunity opens before closing is also important to the entrepreneur. From this explanation, time is the main determinant in the identification of a business window and the time within which the entrepreneur should act on his plans. To begin with, the proposed business targets the college and high school students as the main customers. The period within which the business can enjoy this as its customers are determined by various factors that make it a window of opportunity in the business. The college and high school students are available as customers to the business for only a limited duration within which the business should fully utilize the opportunity. Within this period, the business will be lucrative and the managers should, therefore, be prepared to handle the demands. This window opens when the schools are in session and closes during school holidays and public holidays. The time within which different