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Flow chart symbols youll notice that the flowchart has different shapes in this case there are two shapes those with rounded ends represent the start and end points of the process and rectangles are used to show the interim steps. Beyond the basics you may also have heard of features called cloud flow designer or visual workflow cloud flow designer has been replaced by flow builder a much faster tool that streamlines flow building and maintenance with a simplified user . What is an er diagram erd first of all what is an entity relationship diagram entity relationship diagram also known as erd er diagram or er model is a type of structural diagram for use in database design. Each drill site requires between 3 and 5 million gallons of water per frack fracking hydraulic fracturing fracking is the process of injecting fluids under high pressure into a well to create fractures in deep shale rock that allow natural gas to escape