● Location: Openings’ treatments are dependent on the location of the opening. These factors are: ground floor, upper floor levels, attic, cellar, etc., road touch faces, side and back side faces, public or private spaces, open vista or cut out spaces.
● Orientation: Openings’ treatments are orientation specific. The variables are: directions like North, South, East, West, sun’s angel of incidence, breeze direction, degree of privacy, orientation value in terms of landmarks, natural features, etc.
● Environmental conditions: Environmental effects are very directional, diurnal and seasonal. The environmental constituents are: time of the day or night, seasons, solar incidences, and breeze directions.
● Functional units: Openings’ treatments serve the interior functions of the space units such as the bedroom, drawing room, kitchen, toilets, offices, store rooms, etc.
● Utilitarian purposes: Openings serve utilitarian purposes such as: ventilation, illumination, breeze catching, vision or vista, security, identification, emergency egress delivery of goods, communication, restricted animal or bird access.
● Height situations: Openings are placed at various height positions such as ground floors, upper floors, cellars, roofs and in terms of height positions such as low, middle, high, etc. For each such reference, the opening’s treatments vary.
● Profile positions: Openings are profiled as horizontal, vertical, inclined, skyward, downward, etc. The nature of exposure to various elements determines the type of treatment that are required.
● User abilities: Some openings are designed to serve specific physiological needs of the users such as: young, adults, infirm, aged, senile, prisoners, mentally retarded etc. Openings’ treatments are designed to suit their abilities, ergonomic and anthropometric requirements.
● Cultural and Social relevance: Openings’ treatments at exterior as well as interior level reflect the personality of the user, which emerges from the religion, customs and nature of privacy or social interaction desired.
● Users’ personality: It is a cumulative effect showing interests and involvement of many people. Individually a user continuously evolves and varies the choices, and one of the crucial aspect of it is subjective need for change with reference to past colonnades.
● Choices and Variations: Need for a change is one of the key determinant for openings’ treatments. A user wants something different from the current state, which may not necessarily be a new theme or entity. Historical styling is one such mode for a change. The change is also caused by alteration of key elements forming the openings’ treatment, such as colour, texture, size, form, illumination, etc.