We all know that nine women cannot make a baby in one month.

When developing a project schedule, projected duration can be calculated as

estimated effort divided by full time equivalent resources multiplied by

some P or “rho” factor of productivity usually a fraction between six and

eight tenths.

According to this formula, given an unlimited supply of resources, any

project could be done tomorrow.

Of course in real life, we don’t usually have an unlimited supply of

resources. And there are costs of on boarding per resource, and

collaboration. So even if we did have unlimited supply, we probably would

fail some financial constraint in that staffing model.

But we need to look at the work itself to determine how many resources can

be employed concurrently to get work done in parallel. What real and

assumed dependencies require work to be done sequentially? What can

overlap to allow more resources to be productive at the same time? And

finally, what design decisions have we made that impose constraints on our

parallelism?

If sooner is important, then you may have to design this baby so that nine

women can make it in one month.

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