Saturday, February 13, 2016

Lessons Learned

For several years I have wondered about how we learn as individuals and as corporations. An individual relies on experience which is contained in two forms - tacit and explicit. Tacit knowledge is information, facts and figures contained within each person. It is communicated verbally through conversation, storytelling, etc. When that information is written or presented visually it becomes explicit knowledge.

In my own career I am in a constant state of learning. I plan work, schedule it, and execute it only to learn I have missed some detail I had not considered. On the next job I plan work, schedule, include the item I missed last time, execute it and learn something new again. In a nutshell that is how I build experience in my position and add value to our organization.

Take an individual, such as myself, who is learning. Now add three hundred other workers who are all collecting data through mistakes, mishaps, or other events. It turns out everyone is in a constant state of learning, but the learning remains mostly tacit. When a worker leaves a company you don't just lose someone in a specific role at the company. You are losing a great deal of knowledge specific to that organization. Lose enough people and the damage results in the failure to pass on knowledge to the next generation of employees.

So how can an organization capture the experiences of the employees to pass along to current employees and future ones? I hope to use this post to begin the discussion.

Just yesterday I sat through a presentation of 'lessons learned' from several projects. Each presenter had different points, but a pattern seemed to emerge after a while to where the lessons learned filtered in to the following categories: Scopes, Materials, and Sequencing/Scheduling, and change documents.

Scopes
The scope of work is like the Rosetta Stone of the project (Not the language learning software, but the original Rosetta Stone). The scope takes the drawings, and specifications, and makes them trade & site specific. Drawings tell you what, how many, and where. The Specifications tell you the quality of those items. Neither drawings or specifications tell you who should be doing this work. A properly written scope is used to bid the job correctly and maintain clear lines of responsibility during construction.

And still there my be gaps. These in turn should serve as lessons learned for the next project. For example - Drywall point up. At the end of every project, as the paint crews come in, there are usually scratches or areas that need some drywall touch-up. Written in to a drywall subs scope this will mean the superintendent has more leverage at the end of a project to maintain the quality and complete the project while avoiding ticket work.

Materials
When a set of drawings include a new material, like a custom fire place, it is not cause for concern, but an opportunity to learn! Delve in to the details, develop a checklist, and see if it works. If not, why not? Learn the issues and share it with a designer so that the next project is that much better.

Sequencing
All the steps that must be done to accomplish work can be overwhelming. The drawings show two lines to indicate partitions and Virtual Construction only models certain items. What about the 3/4" conduit that has to be run from A-to-B, or the refrigerant lines that are run at the end of the job, or the security and data vendors that come in after the space is complete? How do we plan for these items, account for them, to ensure the work is able to be completed. These sequencing items are critical for a project and cannot be captured in a Primavera or MS Project schedule which deals in days and weeks.

Change Documents
Change documents include drawing issuance, RFIs, submittals & shop drawings, change orders, and subcontractor changes. A project begins with a set of drawings and specifications. Once a project is complete there is a trail of documents that combine to form the Project Documents. This set of documents is wealth of information that usually gets boxed up and set aside. Alternately we should task every project with a Project Closeout Report to capture the lessons learned, like a post-mortem or an after-action review.


  • Did we write RFIs about missing dimensions? If so, how much time did our layout engineers lose in the field?
  • Did we write RFIs about missing or incomplete details? If so, what are the parts to look for?
  • Did we have to issue a change order for backfilling that was not accounted for? How much did that cost us and how do we avoid it in the future?

All of these items cost someone money and time. Little by little a questions will delay progress by half an hour. Half and hour here and there add up in lost time for production, wasted time resolving gaps, and fire drills. How can we analyze a set of drawings early to avoid this?

And better still what is the best way to capture and disseminate lessons learned. The main goal is to get work in place. It is not easy to say, let's stop and think about what just happened, and how we can learn from it on this job, avoid it in the future, and share it with the other teams?

To be continued....

Thursday, March 4, 2010

Parking Garage 03-04-2010

Quick observations on the Parking Garage.

Above: Site Progress as of 2:30 pm

I noticed waterproofing had begun two weeks ago then abruptly stopped. After paying closer attention to the area that had been completed (below left) I came up with a possible reason why work had stopped. The waterproofing had been added to the precast wall and beam members from the ground floor to the top. I thought it was odd that they would coat the architectural grade precast, but pushed the thought out of my mind and figured they were running exterior stone to the top.

Today the waterproofing resumed on the other precast wall, only it remained only on the precast concrete walls and NOT on the architectural precast. Hence, lesson learned. Confirm area to be waterproofed before allowing sub to execute work. The waterproofing was delayed at least two weeks, which could be due to inclement weather, or due to the error in coverage which led to time being used to find a solution. Notice the waterproofing on either side of the precast wall at the lower-right. I think there was some sort of chemical product used to remove the waterproofing. I would be interested to learn how the issue was trully resolved.

Above: Bituminous waterproofing error
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Tuesday, March 2, 2010

Containerized Disaster Relief Housing

A couple of years ago I did a competition for emergency housing relief. The central idea was What if a Katrina-like storm surged on the coast of New York City. I put this small proposal together after work and on weekends, submitting it just for fun. A couple of weeks later I got an email that I had gotten an honorable mention for my proposal. In light of the current situation in Haiti, I think this proposal is even appropriate for any disaster relief situation.

The structure is composed of a variety of functional containers. A commercial or community space sits at the ground level. The roof level is composed of half-size containers filled with rubble and soil which can provide a small space to raise food.

Above: Isometric View of one unit composed of two containers.
Below: Isometric view of assembled structure.

The rest of my entry, the other honorable mentions and winners can be found at the What If NYC competition site. Look forward to comments or questions.

Monday, February 22, 2010

You Tube Video Test

You tube video about crane lift

Thursday, February 18, 2010

ScreenToaster Test Run

I have just tested a newly discovered web-based program called ScreenToaster. I recorded a short video in preparation of a presentation I am supposed to give on Monday (I am going to try it out again in class if I can).




I have the option to load the video either to ScreenToaster website or to YouTube. From ScreenToaster I am able to embed the video here.

Monday, January 25, 2010

Monday January 21 2010
8:30 - 9:50 am
Windy with scattered showers (Heavy rains previous evening)

It has been several weeks since the last update to this blog. According to best practices I am not meeting the frequent update quota of 1-2 per week in order to be a successful blogger. That will change. I am going back to the one-a-week or more postings.

Last night we had sever rains and some flood warnings. There appeared to be de-watering taking place in several locations. The main collection area is at the center of the southern area. The eastern part of the site is being prepared for panels while the western part seems to be finishing. The project appears to be divided into four major sections.

This mornings erection of the precast panels was slowed slightly when a JLG lift had to be pulled out of the mud by the crane.

I watch the crane from about 8:30 to 9:45 while it lifted a panal in place and then lifted the JLG out of the mud.

8:36 am: Crane positions for hoist (2 min)
8:38 am: Crane connections are made to panel (2 min)
8:40 am: Liftoff + hover
8:45 am: Panel is walked toward set location and held (approx. half way)
8:53 am: Panel is hoisted to final position
8:54 am: Panel inserted and adjusted
9:32 am: Cables unhooked from panel
9:37 am: Rigging of JLG lift begins
9:41 am: JLG liftoff from mud
9:44 am: JLG lift set

The job seemed to lose about 10 minutes of time by having to relocate the JLG lift. While it may seem minor 4 workers were needed to rig and coordinate the movement. I'd like to think this delay could have been avoided if the lift had been left on the sidewalk in advance of the previous night's storm.




In addition to this delay the crew for the lifts appeared to comprise of:
1 crane operator
2 riggers
1 welder

Posted by PicasaMore to follow...

Tuesday, November 10, 2009

Google FusionTables and Construction

Recently I came across a new Google feature called Fusion Tables. Like excel Fusion Tables allows a user to visualize database information. When browsing the possible visualization types I found Maps to be the most intriguing.

When I inserted a database I had listing several construction companies and their basic locations in the US I was able to instantly get a Google Map with points indicating the central office locations
.


Not only does this allow you to generate a map of locations, but it also generates a Google Earth File for additional visualization. So what can this tool do for a project?

I have two examples I'll try and explain. First imagine a project going for LEED accreditation. To demonstrate credits for material locations a database of material suppliers and manufacturers can be input in to FusionTables along with the addresses of said suppliers. This can be used to generate a map to illustrate where the materials are coming from.

The second example involves a major construction company with subcontractors all over the country (or a sub with many suppliers). Input all addresses from a database and generate a map so when a new project is up for bid, local contractors and subs can be used.