What knowledge do you have of products and sources for interior design?

Hi, Particularly, the designer should have the knowledge of the product they wanna add in the interiors for the clients benefits and apart from that the interior designer should even have the knowledge of the colors , shapes , materials , structures , woods etc.....
and should be self confident about the start and the end of the project fluently......
and you should mach up the best with the client and that's the most important deal for you as an designer .
If you have the knowledge of the products and the sources of the particular country when you had signed up the deal as different countries have different sort of house plans including the use of the materials they apply for the construction in you should even match up with the budget of the client have to invest for the interior plans even the designers work even results in : Interior designers create interior environments that support people’s soundness of body and mind; protect their physical, mental, and social well-being; and prevent disease, injury, illness, or pain that could be caused by occupancy of interior environments.
And of now you can know that the interior designer's work results in many ways so you need to work out in many ways plans foe the efficiency of the clients.
henceforth i believe i have answered you the best of my knowledge for you useful question ! Thank You, Bushra Shaik.

Interior Designer needs to have a good knowledge about finishes materials, furniture, lighting, colors, MEP systems & last not least the enviromental issues

1some products of interior design are : furnitures, objects & decoration panels, lighting & sound effects, interior space management2about the sources: the important thing is the reactivity way of your mind with anything you live and that mean in our case "creativity" that you could generate

I'm totally agree with "shiak bushra" .

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the designer should have the knowledge of the product for interior design colors , shapes , materials , structures , woods which is a Professional elements in the interior design equation!