From the results, we can clearly see how each tap is affected by each factor. Each factor affects the taps either negatively or positively, sometimes it is entirely unaffected. According to Tortajada (2007) in the case of money, imported water is the cheapest. Energy is needed for three taps, and lesser for imported water. The least manpower is needed for NEWater. Only imported water is affected by political issues. NEWater is the only tap not affected by weather. All four taps are intertwined with locations or land area specifications and require equipment. According to Dolnica & Schäfer (2009) the public does not have so much of a problem with imported water and catchment water as with desalinated water and NEWater (The latter creating bigger issues regarding public acceptance). With the accumulation of all this data, we formed the tick table. According to the table, NEWater and imported water have tied in ranking. This means that these 2 taps hold the biggest importance, and perhaps the most sustainability in Singapore. However, we obviously cannot rely on imported water heavily now as the contract is soon coming to an end. According to PUB (2013) Singapore will have to start upgrading its 3 other taps to be able to meet Singapore’s water demands by 2061.(Azra)
For our data collection, we could have conducted a more extensive research, where we perhaps interview people to further improve credibility of our data. Adding more affecting factors would have helped as well.