A range chart in SSRS can be used to produce a Gantt chart.of project. Below is a link to a great post that explains how to do it. http://pnarayanaswamy.blogspot.co.uk/2010/09/range-bar-chart-gantt-chart-using-ssrs.html Unfortunately I have found the following limitations
The width and height of the range chart does not grow dynamically when run. If too much data is displayed, the chart is unreadable To counteract the above limitations, I have used the matrix control which can grow dynamically in terms of width and height to fit the data which remains readable.