Hi all,I have two small issues with logical relationships, I hope you will get me out of this. The situation is as follows: I issue (Priliminary Clearance):The Project is a 80 Km Highway.I have two activities :A1) Clearing and Grubbing; andA2) Constructing Embankment ;both resource driven and independent teams. I have divided the project length into 5km sections (say S1, S2,…) for the sake of tracking.A1 requires 5days time to be complete and A2 requires 18days time to be completeA2 can start 3days after A1 starts (i.e., SS+3D)As A2 is the Critical Activity in my programme, S2A2 starts immediately after the completion of S1A2. However, I want S2A1 to start just 3days before the start of S2A2 but not after the completion of S1A1. How should I logically relate S2A2 and S2A1 now? II Issue (Deferred Commencement) : I want to commence the construction of a Maintenance office after two years and can be done quiet independently of other project works. Without losing the integrity of the schedule how can I logically relate this commencement to the project start date. Kindly help. Thanks in advance satish