Bottom estimation This is where the actual do so, this is what your actual job is, this is what the job of your team This is what the job of expert judgment, this is the job which is expected of tools by the project management by the sponsor. This will give you the realist take why well factual estimates because this is from the activity level this is where what you actually are going to deliver, it is not looking at the project from the top it is not looking at the project from anywhere in middle it is where actually where you need to deliver the job the actual juice the actual art core work. So, if the activities for eight hours you need to identify the activity you need to identify the cause you need to identify the estimate schedule, duration at that level and then you will sum up it This way when you are on activity level your variances are low, you can control the variances you can look at the trends very quickly and fast it is a detailed cost and absolutely not summarization summarization of it is going to be summed up or rolled up from activity to activity and then every activity will give you the above level and then the above level and then there was until you get the project.

So, yes, it is where you will go into the details of what kind of resources you want, whether human or physical, physical or equipment, it is going to go and identify all the risk at that work pack at that work packet level and the activity level that what would be the risks that could impact this small activity of eight to 80 hours that if this is delayed, this will help you identifying the critical path method, because then if any activity which is on the critical path method which has no float, if that is delayed what will happen this will help you identifying the divergent and convergent activities because now you actually know what that project is look like what the whole product is looked like you know how it is you are going to deliver it. So, you go from start as I said work breakdown structure is top bottom to top top to down, start from the project you need to deliver the project then you start working on the other areas what is the next level then what is the next level as I told you what breakdown structure is completely dependent how you as you as a project manager or a project management team or the sponsor want to see it, how you want to control the project.

So you want to do face value you want to do function wise you want to do speculative advice, it is completely upon you is on face to face before so no problem. civil engineers, civil, electrical mechanical, no problem market It finance no problem. This is how you want to see the product. This is how you want to see the project. Then work breakdown structure verification, advisory Nasir definition is from top to down and verification is bottom to up and that is where activities comes up. So, whatever activities you have defined after the last level of work package, which is the last component, last level, last logical component of delivery, where you have one person responsible, these activities will be defined to deliver this work package.

So, when to work package will deliver maybe a level up control account level up for breakdown structure, components will be delivered. So this is where you will be working on a method of estimating all resources for all project duration and all caused by aggregating and estimating at the lowest level possible. lowest level possible is very important. You don't want to go to a level which is beyond imagined beyond logic. A relationship beyond logic. So, you you need to see where you want to stop, then create work breakdown structure without break down structure, you will not able to do the activity for every work package defined labor if you open material supply that identify the rates for each resources, calculate the estimate and multiply the rates identify other direct and indirect costs.

So, this is actual is this is actually what is expected of you, but in planning, this is not expected of you in estimate and bidding This is not expected of you when you are initiating is not expected a few when you are in the beginning of the project. This is this is expected of you when you have a clear understanding of the project and it's again it's a rolling wave plan. The more that you The more information you have the more you can divide better, you can devise better estimation on challenge one challenge is to make the estimate a good estimate amount of information Quite a time and so, this is as I said, rolling this plan, progressive elaboration, it is completely directly dependent on the information it is obviously not the easiest way of doing it but is obviously the most accurate way. You need good time you need good expert judgment you need good team commitment to identify this level.

The only challenge that we have here is the padding and the elastic padding. This I will answer when we will go into the three point estimates. Thank you very much. This is the end of bottom up estimation