Interior design describes a group of various yet related projects that involve turning an interior space into an "effective setting for the range of human activities" that are to take place there.An interior designer is someone who conducts such projects. Interior design is a multifaceted profession that includes conceptual development, liaising with the stakeholders of a project and the management and execution of the design
The requirements for interiors are unique and it varies from person to person and place to place because this concept is majorly based on individual interests,however some of the basics are
1) Thorough in measurements this helps you very much in quantity estimates and billing to workers,most of the people uses inches,footage,Meters,and Millimeters also know the relationship between the units and areas, some of them are
1 foot=12 inches1Meter=1000mm1 Square foot(sft)= length of item(ft) X breadth of item(ft)for an example your living room length is 10 ft and breadth is 7 ft than its area is 70 sft.
2) Idea in CAD software's is an added advantage which helps you to create fabulous designs,some of the popular are
a) Auto CADb) Adobe Photoshopc) Google sketch up for 3d view
3) Understanding market place and spend most of the time in it, this will helps you very much in designs and costing of the project.
4) Idea about colure combinations and patterns etc.