We very often develop a Gantt scheduling application for manufacturing companies. In these cases, our customers want to schedule orders (and their operations) and manage the machine utilizations by using Gantt charts. A machine utilization Gantt chart illustrates which operations are worked off at which machines at which time. In case that an order consists of many operations, links are used to let the planner better understand the depdencies. Typically, these links can, however, only be switched on or off for the complete view and all orders. If a company processes many orders simultaneously, displaying these links can result in a “visual chaos”. This blog post shows how - by using a trick - you can display only links of selected orders when working with our .NET Gantt chart control VARCHART XGantt.
An order in a manufacturing company usually consists of different operations. In metal processing, for example, the sheet metal for an ordered product has to be punched out first, then the several parts have to be welded together and afterwards the whole product has to be coated. The below Gantt chart represents the typical "machine view" of a scheduling application, and provides an immediate understanding of the respective machines' loads. However, it does not give you an understanding of the dependencies between the operations.
A standard technique to keep track of dependencies is to use links. However, if the option only is "show links" or "do not show links" and if the Gantt shows many orders with a lot of operations, the visualization of these links can be quite challenging for the planner.
The solution of this link overload lies in the selection of links. Only the selected order is to be focussed on and provided with links. Thus the planner can precisely track the order he is just controlling or wanting to change via drag & drop.
So, this was the "theory". Let's get hands-on and look how to achieve this with our .NET Gantt control VARCHART XGantt. Hence, we ask you to first download the file VcLinkVisibilityHandler.cs and use this class in your .NET project. From now on, all links will be hidden, except when an operation is clicked. As soon as that happens, the complete chain of dependency will be shown.
This class works now.
Tips:
Would you agree that this blog post was the solution to one of the challenges you face every day since production scheduling is one of your main responsibilities in your company? Then have a look at this post dealing with another key issue of production scheduling: How to visualize resource bottlenecks in a Gantt chart
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