The share of informal unorganised sector is more than fifty percent and given the size of India, dependency on surveys of unorganised informal sector is inevitable. The administrative data on these enterprises and on employment is also not available given the size and characteristics of the informal sector. The frequency of surveys of unorganised enterprises and employment are around 5 years. This paper presents, the different approaches followed in the compilation of various different sectors of Gross Value added of the informal economy. An approach titled Effective Labour Input approach to estimating the GVA of the unorganised sector is presented in the paper. The present paper is an initiative to understand the various dynamics related to workers in organized and unorganized sector. The objectives of the papers are to know the various issues related to workers in unorganized and organized sectors and to undertake empirical study on this topic. Secondary data used for the present study. Some of the findings are poverty is more in unorganized sector, lack of technology and market orientation, no social security, poor health condition, substandard working conditions, harassment at work places, inadequate and unequal wage structure , long working hours, poor housing facilities, lack of safety measures, no proper education to children, low earning etc. in additions to others.