Lead Time and Lag Time - Key Concepts in Project Management from the PMBOK

[@Vlogimo]

Great job explaining it. I finally wrapped my head around this.

[@azamattarasbaev8571]

David, you are great at what you have done!!! Thank you

[@mc2ryan100]

Thanks this was always confusing to me, concise and clear explanation.

[@veeraansuri4840]

Hi David, you videos are up to the point of topics!!! Excellent job

[@patrickbradshaw8238]

Thanks David - excellent example It is worth noting that although leads and lags may be best practice planning, if planning on undertaking a schedule risk analysis (QSRA), it is best to replace lags with tasks. The concrete cure is a good example, but is subject to risk and uncertainty dependant on the weather (cure time would be quicker in hot weather in summer vs cold and wet weather in winter). Even if you aren’t undertaking a QSRA, converting these lags to tasks allows you to acknowledge this uncertainty in the activity, even if it is a fattening of the activity duration to the longest potential curing time.

[@tundeadeniran7011]

Thank you for this. Easy to understand

[@andrell1206]

this was extremely helpful

[@TheChe555]

Nice and simple explanations!

[@zinebzitouni4801]

Great examples thank you

[@graham1206]

Great video, very helpful!! Question: Wouldn’t the lead time example be Start to Start? Because the photoshoot doesn’t need to finish (it only needs to start) in order for the photos editing process to start?

[@AdejoKenny]

Not exactly....some photos must have been taken (some time spent) before they're available for editing. So both activities can't commence at the same time. Hence, the original relationship between both was a Finish-To-Start.

[@SforSnek]

I had the same question. The initial important dependency to me seems to be that editing can start 1 day after the photoshoot begins (although it also can't end until at least 1 day after the photoshoot ends). I would have thought the photoshoot example would be start-to-start with a lag of 1 day. However, as far as I can tell, the outcome of the two options the same. So @david, does it matter?

[@hossainabdullah539]

Great 👍

[@iamthecod]

Hi David - really love the videos 💪. I Have always understand lag as you have described it but the way PMP guide v7 shows lag (pg60 fig2-16) is making my brain melt. Activity 8 has a +1 lag over activity 7 but both starts and finished before activity 7. If you could use your laser sharp skills to explain my misunderstanding, I’d be massively grateful - I have the exam later this month

[@muazamran5732]

Why didn't I find this video 4 years ago? By the way, thanks a lot!!!