Professional project management software is not just for managing projects but it lets determine your style of management, efficiency of your efforts, and success of your team. In contrast to open source packages , those solutions give you a complete set of tools for planning, performing and controlling projects, tasks, activities, processes, etc. Even the best open source project management software will not provide you with the same tools because usually open source solutions are targeted at the specific audience of users who make not great demands while professional software is designed to meet needs and requirements of users who look for a complex project management solution.
It is quite natural that the right solution should be applied to the right projects. Otherwise, most likely goals will not be met, expected results will not be produced, and customers will not be satisfied. For instance, when a large-scale IT project is managed by means of some open source project management software free solution, the IT project manager faces difficulties in organizing the team, communicating with stakeholders, controlling processes and tasks, administering project funds, and more. In this situation, the problem consists in the lack of tools that could allow the project manager to develop a complete project infrastructure and organize resources. For projects which require powerful functionality open source php shareware is inapplicable, and the right choice should be made at the very beginning of PM process.