A Civil engineering project arises from two main parameters, First is Need based project and second is Idea based projects, Examples: In a city like Mumbai, India where there is large population and low space availability, its is needed to alter the process of constructing the city via using a Flyover or underground subway, etc. Here the said Flyover or underground subway is needed to meet the demand of better infrastructure and livelihood in the city. So projects involving constuctions to meet the need of the present population is categorised in NEED based projects. Now since we now know that area availability in Mumbai is a big problem and hence we need to find a solution to this. Hence the government decided to make a Pilot city adjacent to Mumbai in the creeks and call it by the name \'Navi Mumbai\' or \'New Bombay\'. The idea behind this was constructing a 2nd city on the same lines with Mumbai but with proper and efficient management to cater for the future and also to slightly decongest the Parent city i.e; Mumbai. So projects involving constuctions to meet the expected future growth of population or in some case to meet the depletion of natural resources, are categorised as IDEA based projects. Solution A Civil engineering project arises from two main parameters, First is Need based project and second is Idea based projects, Examples: In a city like Mumbai, India where there is large population and low space availability, its is needed to alter the process of constructing the city via using a Flyover or underground subway, etc. Here the said Flyover or underground subway is needed to meet the demand of better infrastructure and livelihood in the city. So projects involving constuctions to meet the need of the present population is categorised in NEED based projects. Now since we now know that area availability in Mumbai is a big problem and hence we need to find a solution to this. Hence the government decided to make a Pilot city adjacent to Mumbai in the creeks and call it by the name \'Navi Mumbai\' or \'New Bombay\'. The idea behind this was constructing a 2nd city on the same lines with Mumbai but with proper and efficient management to cater for the future and also to slightly decongest the Parent city i.e; Mumbai. So projects involving constuctions to meet the expected future growth of population or in some case to meet the depletion of natural resources, are categorised as IDEA based projects..