One of the main advantages of OO programming is its ease of modification; objects can easily be modified and added to a system there by reducing maintenance costs. OO programming is also considered to be better at modeling the real world than is procedural programming. It allows for more complicated and flexible interactions. OO systems are also easier for non-technical personnel to understand and easier for them to participate in the maintenance and enhancement of a system because it appeals to natural human cognition patterns. For some systems, an OO approach can speed development time since many objects are standard across systems and can be reused. Components that manage dates, shipping, shopping carts, etc. can be purchased and easily modified for a specific system.

In the electric power generation industry duties could vary from  expertise in thermodynamics, heat transfer, efficiency, and fluid dynamics to power plant testing, and modeling.

In forestry, modeling is primarily done using computer programs to imitate individual stem growth, stand growth, fire characteristics, insect infestation, forest ecosystem dynamics, log inventory distribution, forest land valuation, wildlife population dynamics and strategic forest level planning to name a few.In forestry forest modeling is used to simulate forest growth and dynamics to undertake timber supply analysis, prepare strategic level plans and calculate allowable annual cut (AAC).