What is indicator

What are indicators? An indicator is a specific, observable and measurable characteristic that can be used to show changes or progress a programme is making toward achieving a specific outcome. There should be at least one indicator for each outcome. The indicator should be focused, clear and specific.

What is called the indicator?

An indicator is a chemical compound that changes its colour in presence of an acid or base. Indicators are generally derived from plant pigments and are mildly acidic or basic in nature.

What is indicator in chemistry?

chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.

Why do you mean by indicator?

Outcome, process and structure indicators\n\n Indicators can be described as three types—outcome, process or structure - as first proposed by Avedis Donabedian (1966).