Time and Cost Optimization of Unitized Façade Using Pull Planning Technique

Nowadays, the Unitized Façade system is becoming more important and popular due to its modern appearance and visual aesthetics in high-rise buildings. The entire building envelops quickly through unitized façade system which results in the external and internal environment getting separated. The Unitized Façade system has brilliant resistance to environmental factors such as general weathering, ultraviolet rays, and ozone. Utilizing the Unitized Façade system optimizes the number of labors required for the amount of manual handling at site in potentially hazardous conditions. Due to lack of technical knowledge and research, a limited number of construction professionals are familiar with their execution process. It has been observed that the project gets delayed due to improper execution work, lack of co-ordinations in labors, miscommunication between the stakeholders, consistent rework, mismatch of activity sequence, and overproduction of panels which directly affects the duration and cost of the project. The aim of this research is to optimize time and cost parameters by using the  lean principle Pull Planning Technique in the Unitized Façade execution process. The pull planning technique is a practical approach of lean principles which focuses on the end goal rather than starting from the beginning and it works backward. This technique is a significant time and cost-saving process which reduces redundancy and eliminate unwanted delays. Lastly, Microsoft Project has been used for synchronizing all activities of the Unitized Façade execution process.