Linking Schedules to 3D CAD Systems Dynamically

We have used 4D extensively on the mechanical and piping works with specific reference to construction rather than petrochem projects. In particular, it has proved useful in sequencing installation schedules where multiple layers of pipe or ductwork, including cabling trays, have to be installed adjacent to or above each other. The models are taken straight from CADPIPE or CADduct but with slightly less detail on brackets and some of the connection information which really is not necessary as the guys installing the services are more than capable of handling the process at that level. Also, when installing main plant items it is very good for planning logistics and delivery dates well in advance, which with long lead-in times for these items, is of particular use in procurement. All area’s don’t need the same level of planning detail so although the same number of tasks may be available to programme, bearing in mind the additional detail within the 4D planning environment, in discussion with the contractors responsible, we focus on those area’s with the biggest issues for coordinated activities or interfaces between contractors.

I have used 4d effectively on a large concrete structure, but I can see the benefits for planning complex piping jobs by identifying optimal locations for field welds and spool installation sequence.



Has anyone here used 4d simulations for mechanical and piping works?

I haven’t had any experience of CommonPoint but have worked with A3D’s PAL system over the last 7 years, which is similar to what CommonPoint developed. By using the models as the basis for planning a project, as opposed to linking the programme to the model (it may seem a small difference but makes all the difference), the programme is developed from the design information. That way, when change occurs it can be better managed both in terms of time and cost and associated resourcing.



We work alongside the Construction Planner of the Project or Construction Manager, as the skill set required is a combination of Planner, Construction Manager and CAD technician, which doesn’t necessarily exist in the open market place. The Process has been deployed on over 50 projects of varying sizes and type i.e. commercial; retail; residential; whole city block; high-rise, etc. and uses off the shelf CAD and Planning software so you don’t need to go out and buy a whole new CAD system and you can continue to use your planning software as it was designed to be used, entering resources, running Critical Path Analysis etc. However, at the end of the day you have a model to interrogate everything you do and because you have worked through the model to get there, you know the project inside out along with all the critical interface issues, and can communicate that to all the different levels of people involved in the delivery process.

Hi Arno,



Thanks to you regarding the website link you gave me , infact I had a excellent demo from these people. The fact remains that it is more suitbale for INFRASTRUCTURE WORKS.



Cheers



Sunil

I combined 3d Max and timeliner. 3d Max to make simple 3d drawings, and timeliner to link them to the planning and animate the process.



Timeliners connection to the planning is not really that interactive by the way, you’ll need to reload your planning in timeliner after something has changed, and re-record any movies you may want to have. But nothing that’s to much trouble I think. Especially because you can seperately record the camera movement, so unless some large changes take place in the planning the re-recording should be finished in minutes.

Peter,



Will jump in here now as you have also started this thread.



Original question posted on the other thread



"Any of you lot had any experience with 4D CAD.



Is it worth the effort, is it just a gimmick, is there any real value added to a project by using it ? "



We are looking into it’s use on a very large civils project and have seen this website amongst others.



http://www.stanford.edu/group/4D/examples/examples.shtml>



I can not remember where i found it but the general consesus it that this type of tool is usefull for Foremenn etc as it give them a very good pictoral view of where the project should be at and when.



BTW I have some research papers that i could send to you.

http://www.navisworks.com/index.php

Hi Arno,



Can you provide me with the web site.



Thanx



Sunil

Hi Peter,



I do. I think it’s pretty easy to work with, as long as the drawings are in the right format.



I played around with the Navisworks software a lot for my former employer to figure out if it would be a good idea to start selling it in the Netherlands. It’s compatible with P3 and MsP, and more or less interactive linked to your plan (you will have to tell the software to re-read the planning).

You can make pretty nice ’4d’ stuff with it. A couple of examples are available on the Navisworks website.



Feel free to contact me if you want to know more.



Arno