Internal Factors Cause Change Order in High-rise Building Projects, Case Study: Hotel Projects in Malang

Change is a common thing in construction. With change orders, changes can be made to change the scope of work or quality. This study consisted of 70 respondents from the owner, consultants, and contractors who handle high-rise building projects. From the respondent's response to the internal change order factors that affect time and cost performance by using the Relative Importance Index (RII) analysis, from the Owner side indicator produces the owner variable instructing additional work, from the consultant indicator it produces estimation error variables, from the contractor indicator it produces the delay variable previous construction by another contractor. Based on case studies, the number of added time resulted in 22.91% of the contract planning time. Meanwhile, the number of additional costs resulted in 8,717% of the planning cost contract.