Digital manufacturing

Digital manufacturing is an integrated approach to manufacturing that is centered around a computer system . The transition to digital manufacturing has become more popular with the rise in the quantity and quality of computer systems in manufacturing plants. As more automated tools have become used in manufacturing plants it has become necessary to model, simulate, and analyze all of the machines, tooling, and input materials in order to optimize the manufacturing process. Overall, digital manufacturing can be seen sharing the same goals as computer-integrated manufacturing (CIM), flexible manufacturing, lean manufacturing, and design for manufacturability (DFM). The main difference is that digital manufacturing was evolved for use in the computerized world.
As part of Manufacturing USA, Congress and the U.S. Department of Defense established MxD (Manufacturing times Digital), the nation's digital manufacturing institute, to speed adoption of these digital tools.
Three dimensional modeling.
Manufacturing engineers use 3D modeling software to design the tools and machinery necessary for their intended applications. The software allows them to design the factory floor layout and the production flow. This technique lets engineers analyze the current manufacturing processes and allows them to search for ways to increase efficiency in production before production even begins.
Simulation.
Simulation can be used to model and test a system's behavior. Simulation also provides engineers with a tool for inexpensive, fast, and secure analysis to test how changes in a system can affect the performance of that system.
These models can be classified into the following:
Applications of simulation can be assigned to:
Analysis.
Digital manufacturing systems often incorporate optimization capabilities to reduce time, cost, and improve the efficiency of most processes. These systems improve optimization of floor schedules, production planning, and decision making. The system analyzes feedback from production, such as deviations or problems in the manufacturing system, and generates solutions for handling them.
In addition, many technologies analyze data from simulations in order to calculate a design that is optimal before it is even built. 
Debate continues on the impact of such systems on the manufacturing workforce. Econometric models have found that each newly installed robot displaces 1.6 manufacturing workers on average. Those models also have forecasted that by 2030 as many as 20 million additional manufacturing jobs worldwide could be displaced due to robotization. 
However, other research has found evidence, not of job losses, but of a skills gap. Digital manufacturing is creating hundreds of new data-centric manufacturing jobs — roles like “collaborative robotics technician” and “predictive maintenance systems specialist" — but not enough available workers with the skills and training necessary to fill them. 
Tooling and processes.
There are many different tooling processes that digital manufacturing utilizes. However, every digital manufacturing process involves the use of computerized numerical controlled machines (CNC). This technology is crucial in digital manufacturing as it not only enables mass production and flexibility, but it also provides a link between a CAD model and production. The two primary categories of CNC tooling are additive and subtractive. Major strides in additive manufacturing have come about recently and are at the forefront of digital manufacturing. These processes allow machines to address every element of a part no matter the complexity of its shape.
Types.
Cloud-based design and manufacturing.
Cloud-Based Design (CBD) refers to a model that incorporates social network sites, cloud computing, and other web technologies to aid in cloud design services. This type of system must be cloud computing-based, be accessible from mobile devices, and must be able to manage complex information. Autodesk Fusion 360 is an example CBD.
Cloud-Based Manufacturing (CBM) refers to a model that utilizes the access to open information from various resources to develop reconfigurable production lines to improve efficiency, reduce costs, and improve response to customer needs. A number of online manufacturing platforms enables users to upload their 3D files for DFM analysis and Manufacture. 