own e-shop, specialized in selling software and computer games. The target customers for the company's products are computer games players, on the one hand, and software products users, both individual and organizational, on the other hand. The new e-shop will offer products created by the company, as well as products created by other suppliers (producers or distributors) interested in distributing software and/or computer games through the new online system. The most important advantage for buyers is the possibility of acquiring the desired product more rapidly, without having to travel to a traditional shop or paying cash. Clients that pay for their products through credit card can download the software product or the game they want directly from the web. The company also plans to offer its potential clients the opportunity to try the software products before buying. Therefore, any person who is interested can get a free shareware version. For those who decide to buy the product, the company offers an advanced version and certain free services.
             Firstly, the situation will be analyzed using the Program Evaluation and Review Technique, also referred to as PERT. PERT was developed in 1958 and was used in the military field first. It is very helpful in reducing both the time and cost necessary for completing a project.2 In order to apply PERT, the following steps must be followed: Identifying the specific activities and milestones. By activity one understands the tasks required in completing the project while the milestones (events) mark the beginning and the end of one or more activities. Determining the activity sequence means determining the exact order in which the project's activities must be performed. The following step is constructing the network diagram that shows the sequence of the serial and parallel activities.
             After the network diagram has been drawn, we must estimate the activity times, usually represented in weeks a...