Sarchashmon aur maakhaz ka yeh usool insaan ke banaye hue tareeqa-e-kaar, jaise ke sanat o hirfat par bhi poori tarah saadiq aata hai, jis se humein kai tarah ki mufeed masnooaat muhayya hoti hain. Misal ke taur par, agar aap ko apni gaari ke liye khalis aur asal purzay (genuine parts) chahiyein, to aap ko usi company ki taraf rujoo karna hoga jis ne woh gaari banayi hai. Aap kisi doosri company ke paas nahin jaate kyun ke aap ko woh purzay sirf aur sirf majaz wa baikhtiyar dealer se hi hasil karne parte hain. Agar aap Rolex ghari ki dekh bhaal aur marammat chahte hain, to aap Rolex company ke paas jayenge, Timex ke paas nahin. Isi tarah, agar aap tankon se bane kisi tokray ki marammat karna chahte hain, to aap pathron ke bajaye usi ke asal mawaad yani tankon ka hi istemal karenge.