Successfully running a project that implements a new solution on budget and on time requires careful planning, monitoring and control.
Peoples’ daily tasks are affected by switching to new software or utilizing new features in already known software.
The success of the development efforts certainly depends on careful planning, continuous tight control, and coordination of many deliverables from numerous contributors.
It helps following a development process, and there are helpful tools available to manage all the tasks.
For task management in large projects, I prefer Atlassian’s Jira and Confluence tools, or Trello for smaller projects.