These depend on many factors such as customer and manufacturer demand, safety protocols, physical and economic constraints etc For some types of aircraft the design process is regulated by national airworthiness authorities
अनेक औद्योगिक, शैक्षणिक, वैद्यकीय, राजकीय, सांगीतिक लघुपटांसाठी तसेच अनेक दृकश्राव्य कार्यक्रमांसाठी सोमण यांनी संहिता लिहिल्या आहेत.