I’ve realized several things about Gantt charts in the industry. The plan laid out by Gantt chart should be followed as close as possible, especially since projects have deadlines to be met. However, one has to consider there will be setbacks and there will always be problems that cause dates to be pushed back or become more flexible. In my experience, projects have been pushed back for several reasons: design changes leading to re-testing, problems with documentation, regulatory issues, budget issues, and inconsistent data. When creating a Gantt chart it is very important to keep in mind that these things will come up.