The Aerospace industry is a multi billion pound development base which would cost ten times as much to bring a model to fruition if it wasn't for the abilities of the modelling and simulation software used to attain specs on aircraft before a prototype is built. At each manufacturer hundreds of people work on computer simulation on different aspects of a plane, from engines to wings and passenger flow to ascertain which model works best.
Every aspect of aeronautics utilises a form of software as either a training module as a specific tool to test equipment, engines and materials before putting them into real terms use. When a company decides to use software in this field of study, they are reducing cots by a huge margin and also saving years in development time and build time. Before the day of computers, drawings were used with teams using complicated mathematical theories to develop their products, a computer can do this in a matter of hours all on its own, often in minutes.
Most systems and software are developed individually for each company. Information about all materials and parts specifics are meticulously entered into a live database which helps to program the software. Once all information is entered, then development teams can begin the process of advancing their product to the next stage or adding a completely new technical aspect or find alternative materials, parts and solutions to make a plane go faster become more streamlined, better electronic cabling and operations and so on.
Without computers being used in this way in the aeronautics industry would take decades or teams of thousands of people to get just one model aircraft off the ground. At most it takes several years from inception to build before a new model comes to market. Though modelling does the majority of work for developers and tech teams, everything from wind tunnels to engine tests, simulation is a valuable aspect also. This allows pilots to enter a training program which saves on flying hours and cost on fuel.
While real world events allow a pilot to learn their trade in training, gaining flight time in a simulator and prepare for a variety of events which could occur which they need to have knowledge of beforehand. This is just one area and a brief overview of how modelling and simulations is used by the aerospace industry to get results in development on a computer alone, without any need for prototypes or real world scenarios to be built, savings billions of pounds and thousands more in man hours.