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FS, SS, FF, SF: Choosing the Right Relationship Type
What finish-to-start, start-to-start, finish-to-finish, and start-to-finish relationships mean, when each fits construction work, and how they go wrong.
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Forward and Backward Pass, Worked by Hand
A step-by-step forward and backward pass on a nine-activity foundation-to-dry-in network, with early and late dates, total float, and free float.
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Lags and Leads: The Hidden Logic in Your Schedule
What lags and leads do in a CPM schedule, why they hide work, how lag calendars change dates, and when to replace a lag with a real activity.
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Near-Critical Paths and Why They Deserve Attention
Paths with a little float are often a bigger risk than the critical path. How to define near-critical, track float erosion, and spot paths about to take over.
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Open Ends and Dangling Logic: Finding and Fixing Them
Open ends and dangling activities make float lie and hide delays. How to find missing predecessors and successors, SS/FF danglers, and how to fix them.
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Schedule Constraints: When to Use Them and What They Break
The types of date constraints in P6 and MS Project, which ones override logic, how they create negative float, and when a constraint is the right tool.
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Total Float vs. Free Float: What Each One Tells You
Total float protects the finish date. Free float protects the next activity. How each is calculated, why float is shared, and how to use both on site.
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What Is the Critical Path Method? A Plain Guide for Construction
What CPM is, how the critical path is found, what float means, and how to read a CPM schedule on a real building job without getting lost.