This paper proposes the problem of delays in the construction industry. The main purpose of this study is to identify the delay factors and the effect on the project completion by doing a case study in projects. By analyzing the reasons for the delay, possible recommendations are given. The most important causes of delays shortage of material like cement and aggregate in Production of concrete, weathering condition, methods of operation, shortage of manpower, frequent change in staff, poor site management. This project is highlighting the study of Batching plant productivity without affecting the quality of concrete by doing the study of various batching plants sites for the factors which could affect the output of batching plant and observed such factors in time. The major effects of delay are cost impact, reduced labor productivity, postponement in work, change in labor allocation etc. Not all delays can be rectified, but few of them can be overcome by improving management responsibilities This paper explains why productivity at a construction site is reduced due to management factor mechanical factor and others