The functional performance of a building envelope depends on the correct specifications of the individual components that make up the envelope mounting system, the quality of manufacture of these components, and thus the installation standard. Good performance also requires a high degree of interaction between building envelope installations. This interaction requires identifying activities that complement each other, and thus the strength and willingness of those wanted to request a "whole building envelope". Therefore, well-installed envelope can ensure that occupants have productive and healthy indoor environments. This paper proposed a methodology by integration three different framework (Lean, Six-Sigma and mega building envelope installation) during a systematic approach to improve building envelope installation and eliminate redundant time and materials, upon arriving material to the site. Our aim was to demonstrate through a project in hotel towers in Egypt in Cairo - Maadi (upon the arrival of mega enveloping materials for construction) that the methodology has the potential to reduce material waste, time duration, and potential savings while integrating (Lean, Six Sigma framework using their tools) In the framework of implementing the mega building envelope upon arrival of materials} inspired by the work and practices of various building envelopes companies.