Method 4. Personally, I find it the most convenient. In the Predecessors column for the successor task, write down the number (identifier) of the predecessor task with the necessary type of dependency, for example,
3SS or
4FF. For the FS dependency type, you do not need to specify letters, the predecessor’s number is enough, for example, 5. If there are several predecessors - we list them through a semicolon:
4ss;6ff;7. A comma also can be used as a separator:
4ss,6ff,7 Leads and lags can also be used in all types of dependencies.
More on this in another article.