Construction is the plant implementation phase, during which all the works and activities planned during the Detailed Design phase are effectively carried out. A Start-up is the set of activities that need to be carried out in order to roll out the required product for the first time, from the “oil in” to the plant performance tests. Before actually introducing the feedstock several activities are conducted – commonly known as Commissioning. These services, in the case of small plants can be delivered on the basis of a “Turnkey” type Contract.