开始 = if activity already started, then it is activity Actual Start Date/Time, otherwise it is activity Early Start Date/Time SU1N*k#-o
完成 = if activity is completed, then it is activity Actual Finish Date/Time, otherwise it is activity Early Finish Date/Time D(OJr5Gg
计划开始 - a MEANINGLESS value if F9 is done 8Ihl}aguW
计划完成 - a MEANINGLESS value if F9 is done ANNVE},
目标计划开始(完成)= if baseline project activity ...