1.2 Answer:1.2.1 IntroductionWe often come across the word “excellence” in management, practice and production, etc. but what actually is excellence? According to the Oxford Dictionary, the word “excellence” is defined as the quality of being extremely good or exceptional. Furthermore, Oakland (2002) also stated that business excellence means “achieving world-class performance”. The success of an organization depends significantly on the implementation of excellent practices. An excellent practice can develop and strengthen an organization's management systems and processes. Furthermore, it can also improve employee productivity and performance. In my experience, sustainable construction is one of the best practices in the construction industry because it can improve performance in order to minimize the consumption of natural resources and energy.1.2. 2 Concept of sustainable building Sustainable or green building can be defined as “any building that is located, designed, constructed, operated and maintained for the health and well-being of the occupants, while minimizing the impact on the environment”. Sustainable construction is often referred to as “green” or “environmentally friendly” construction. However, I will always refer to it as “sustainable”, mainly because it has become the most widely accepted and understood term. The goal is to minimize negative impacts on the environment and create healthy, comfortable environments and improved indoor air quality. In addition to this, "sustainable construction" can also be defined as those buildings that have minimal negative impacts on the built and natural environment. Sustainable buildings are designed and constructed to reduce their impact on our environment through the efficient use of… half the paper… in any workplace, especially for sustainable building projects. This is because sustainable construction is highly dependent on the knowledge and experience of employees. Employees must communicate ideas and provide motivation to perform tasks more effectively. Apart from this, human relations can also improve productivity by providing a source of motivation for employees. In conclusion, I have found that contingency management theory is the best approach to implement in sustainable construction. This is because contingency theory is not just a report on internal influences that include organization, people, and external influences. Contingency theory is also concerned with the situational and contextual factors in each particular organization that show the way to the most effective approach in promoting good organizational structure and organizational relationships.