Gantt

Gantt charts are like horizontal infographics for your project.

They look pretty, you think you have deep insight when you look at them, but in essence they hide a wealth of sins about your project.

Projects are multi-dimensional and it is rare a spreadsheet or the resulting Gantt chart captures all the nuance you need to track and be aware of.

They are a good start, but if all you have is a Gantt chart, then everything looks like a resource to be managed.