Classification Control of Project Variation

Firstly,according to variation contents,the paper divides variation into operating range variation,construction condition variation,design variation,construction variation and technique standards variation. Contraposing to different content variation,the paper puts forward dissimilar control methods. According to the property of project variation,the paper divides variation into fatal variation,important variation and general variation,and points out that we can control variation effectively by establishing dissimilar authority of project variation examination and approval. Finally,according to the urgency of variation,the paper divides variation into variation under urgent circumstance and variation under not urgent circumstance,and puts forward that we can control these variation by different procedure.