It is through combination of engineering and business as one solid branch of knowledge that can become a real complicated branch of learning.  Even just by themselves, business and engineering are two complicated areas of learning already.  You just cannot make heads for the other one without having enough years of exposure and study for those learning areas.  You just cannot make senseless multiple choices for the problems that those areas may have.  You need to be exact and accurate to gain profit and efficiency to your craft.  There is a form of project accounting applied to construction projects called construction accounting.  Especially when multiple contracts come into play, construction accounting is a vitally necessary form of accounting.  This kind of dilemma is very well documented and discussed in reviews about Viewpoint construction software. The field of construction uses many terms not used in other forms of accounting, such as draw and progress billing.  Furthermore, construction accounting may also need to account for vehicles and equipment, which may or may not be owned by the company as a fixed asset.  More or less with respect to the amount of business accomplished, construction accounting requires invoicing and vendor payment.  It’s a good thing that there are online sites offering professional help for construction accounting.