Studies of delay are currently needed, this is to simulate shortening work to get fast and effective spelling. To assess the delay in a project one of the methods is used the Project Crashing and Least Cost Analysis methods. The goal of this study is to simulate the shortening of duration of the work of Shotcrete With Rockbolt in Banyumas, Central Java. So that it can be found the shortest and most effective working time Data collection is carried out by surveying directly to the field, making observations, and by interviewing. The data analyzed consisted of primary data and secondary data using the Project Crashing and Least Cost Analysis methods. The results of this study indicate that the work of Shotcrete with Rockbolt does not have optimal value, this is done indirectly with small value, easy to use for continuous without optimal limits