In addition to marriage and membership statistics, surveys are also conducted by the SDU from time to time to assess the effectiveness of the SDU, and its public education objective in particular.In mid 2006, 2,041 university undergraduates and polytechnic students were polled in an SDU survey on undergraduates' attitudes towards social interaction, dating and marriage.The data, which was collected during a series of face-to-face interviews, showed that, while nine out of ten would like to get married, only 35 per cent of them were certain about their intentions.
The number of marriages has steadily increased over the years from 2004 (22,189) to 2009 (26,081) and crude marriage rate (per 1000 resident population) has been on the rise from 6.4 in 2007 to 6.6 in 2009. The mean age for first marriage has increased from 28.7 to 29.8 (males) and 26.2 to 27.5 (females) over the last 10 years.
Other responsibilities of the SDN include providing the necessary infrastructure and support for the dating industry, as well as to ensure the professionalism of dating agencies through an accreditation council that was formed in 2007.
SDN's role in the industry has not always been that of facilitating and accrediting.
On 28 January 2009, the SDU and SDS merged to become a single entity, tentatively named SDU-SDS, consolidating their respective resources and exposing their constituent members to the larger, merged database.
It was renamed as Social Development Network or SDN on 16 October 2009.