Demystifying lean construction
Thursday, November 17, 2016
For centuries, construction firms of all makes and models have struggled with productivity. While other industries have benefitted from robotics, automation and other technological advancements, many studies indicate that the construction sector has suffered with no sizeable gain over the last 50 years.
Whether it is total quality management or lean, there are countless tools and avenues that enable firms to reduce waste and inefficiency. The greatest example of transformation and adoption of best practices comes in the form of safety management. Regardless of the situation, something provides a catalyst for firms to make a strategic decision to implement a safety-minded culture.
Firms must recognize that even if they appear to excel in labor management techniques, the real power begins with developing a culture of innovation and continuous improvement. The enemy of productivity and any companywide initiative is complacency. By maintaining a strategic plan that is always focused on improvement, a firm has the ability to eliminate the smallest imperfection or even tackle productivity. One of the main tenets of lean is the use of DMAIC:
- Define
- Measure
- Analyze
- Implement
- Control
1. Define
Within this step, the team must develop a problem statement. There are many types of definitions that can be used:- The firm’s labor productivity has continued to decline over the last 2 years.
- Material expenditures have overrun the budget on the last 25 projects.
- There is a communication breakdown between the office and the field.
2. Measure
First, it is important to completely understand the true baseline. What is the magnitude of the problem? Several items to measure might include:- Labor variance on completed jobs (estimated vs. actual) using the following parameters:
- Superintendents
- Managers
- Region
- Customer
- Contract delivery type
- Material variance on completed jobs
- Custom order
- Items routinely stocked
- Subcontractor variance on completed jobs
- Type of trade contractor
- Contract size
- Critical path vs. noncritical
- Material procurement processes
- Accounts receivable processes
- Any planning processes
- Project closeout processes
- Change order processes
3. Analyze
It is also important to note that firms often put their best people on the most challenging projects. Furthermore, it is also important to reference back to the aforementioned processes. Ask the following important questions in the analysis:- Is there redundancy in the processes?
- Where is there little connectivity between critical departments?
- What steps would provide the most value to the field?
- What key steps should be measured in the future?
- What is the frequency of the missteps?
4. Implement
Improve is often the preferred terminology, but implement invokes some sort of change that is required in the new order of things. Three important items to recall are:- Process—There must be a flow chart or value-stream map for each process. Simply put, you cannot measure something if no standard process exists.
- Standard tools—Whether it is a log, agenda, spreadsheet, purchase order or a planning device, there must be consistency in the tools.
- Accountability—Success lies in a firm’s ability to measure and provide true process adherence accountability.