Gantt Wizard - Version 1.3.5 Excel Gantt Charts Generator and Project Estimator for IT Project Managers. We help you to create IT Project Plans. AUTOMATICALLY.Want to create a Project Plan together with an accurate estimation in just a few clicks? Our innovative approach allows to define a Plan starting from the PM effort you think might be necessary on a weekly basis, knowing that such effort will manage the 80% of the overall budget. The longer the elapsed, the more accurate this mathematical relationship is and the easier is the creation of an IT Project Plan. And for the experienced user, many more estimation templates are natively available.