Manufacturing its self had a contribution to GDP. The formation of GDP is made of several contributions including what manufactuting generates.  manufacturing structureswill better contribute if thy are organised. for instance, cluster organisations give better competitiveness to manufacturing.

Manufacturing in the United States accounted for 12.5% of GDP or $2.0 trillion in value added in 2012 (Bureau of Economic Analysis). Globally, manufacturing represents 16.6% of global GDP or $11.4 trillion (United Nations National Accounts Main Aggregates Database). Varying standards between countries, territories, and other political boundaries frequently affects the efficiency of production. When a company has to produce a product one way for one country or region and another way for others, it diminishes the firm’s ability to take advantage of economies of scale. Additionally, the company has to invest resources in understanding and meeting the standards of each region’s regulations. Manufacturing organizations often strive to reduce the number of competing standards so that firms have to meet only one standard. In addition to this activity, manufacturing organizations contribute to the development of standards so as not to impede technological advancement. For example, standards can often be either descriptive or prescriptive. A descriptive standard describes the performance that needs to be met whereas a prescriptive standard prescribes how something is to be constructed or designed, such as prescribing the materials to be used. Prescriptive requirements can impede the development and adoption of new solutions that may turn out to perform better and/or cost less. The activities of industry trade groups (e.g., manufacturing organizations) improve efficiency and result in more products being produced per employee. An increase in the quality or quantity of products produced per person in a country increases GDP per person; therefore, if the population does not decrease and the resources that are freed up from efficiency gains are utilized in other ways, aggregate GDP should also increase.

Quantifying the impact of manufacturing organizations is a significant challenge. The impact of some activities is difficult or impossible to quantify. For example, the National Institute of Standards and Technology (NIST) establishes measurement standards in the United States. If NIST did not fulfill this role, private industry would develop its own method of dealing with these challenges, which might result in numerous types of standards and create the need for conversion calculations between companies. Each company would need to develop an understanding of all the measurement standards. In addition, some might try to take advantage of the lack of a standard system in order to swindle other companies and individuals. Unfortunately, it is difficult to estimate the amount of waste that would be created due to the absence of standard measurements or the amount of economic activity that standards facilitate. However, there are some instances that have provided an opportunity to measure the impact of standards. NIST has a number of studies that measure the impact of some of its activities: http://www.nist.gov/director/planning/impact_assessment.cfm. You might find some of these studies helpful.

Manufacturing directly contributes to GDP. However in the total GDP it is only a small percentage which for most countries ranges around 15%. For countries that rely on exports such as China, Germany and Malaysia it goes higher to up to 35%. However there is an indirect component of the manufacturing that provides service jobs which are more.

You can see here the actual data for all the countries in the world.

http://data.worldbank.org/indicator/NV.IND.MANF.ZS

No one can deny the fact that manufacturing organizations directly contributes to GDP. I agree with above contributors.

Thank you very much in deed that all the researchers has shred a use full knowledge and views because of why manufacturing organisation play a vital role in the growth of country GDP they create a lot of opportunities of jobs for their own country.

For more information to what have been said,  I suggest you take a look at the UNIDO web page (http://www.unido.org/en/resources/statistics/quarterly-report-on-manufacturing.html and ). There are several models developed for linking manufacturing contribution to GDP.