A Gantt Chart

A Gantt chart is a type of bar chart. That Illustrates a project schedule. This chat lists the task to be performed on the vertical axis, and time intervals on the Horizontal axis.The width of the horizontal bars in the graph show the duration of each activity. Gantt charts illustrate the start and finish dates of the terminal elements and summary elements of a project. Terminal elements and summary elements constitute the work breakdown structure of the project. 
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https://en.wikipedia.org/wiki/Gantt_chart#cite_note-FOOTNOTERichman2002117,276-3

We've done a Gantt chart too in this class with is Wood Technology, we planned about making a boat. What we did is we put a time in our each steps, each box represent a 30 minutes so two box is equivilent to 1 hour. After we build the boat we decided to show our Prediction of our boat and the actual time that we've done the step the yellow thing represent my prediction and the arrows are my actual time , here's the Gantt chart that we did.