Continuous improvement requires delving deeply into all processes at manufacturing companies and being able to track both sub-metered energy and raw material data real-time.
However, in the spirit of truly striving for perfection, Kaizen can be taken to the molecular level. We are using technology to look at things we can’t see, feel, or touch. Using specialized monitoring equipment that looks into areas of the factory that typically do not get enough attention, many processes including sub-metering around thermal oxidizer energy usage and general manufacturing plant processes can benefit from this analysis. These might include wash lines, paint lines, compressed air, or substation Peak Demand Data.
Drilling Down by Process
One example of this is in the chemical processes a manufacturing company might use. In a tube mill, data can be gathered on the tons of input, tons of good production, scrap, tooling costs, mill utilization, coolant used, water used, man hours, and energy consumption. Cost savings can be in any of these areas, but energy consumption, water consumption, and wastewater have been hot buttons in 2006 and 2007.
Many factories get one large bill for gas and/or electricity and they don’t really track energy use by process. For example, one Midwestern manufacturing complex that has seven 5-stage tunnel washers was firing up boilers to bring chemical baths up to temperature without paying great attention what was going on daily. When analyzed, the data indicated that bath temperatures were running at the high end of the control limits. Also, the data showed that when operators arrived in the morning they immediately fired up boilers and heated baths to temperature, on average, 30 minutes earlier than required for production. Similarly, at the end of the work day boilers were not turned off until the very end of the day when they could have been turned off approximately 30 minutes prior. As a result, policies for start up and shut down were set for all boilers saving over 1 hour per day of run time per boiler. Annual energy savings exceeded $200,000.
A process audit can be done over a 60-day period to pinpoint where the problem is prior to making recommendations on how to correct the processes. Here are the 6 steps that we have found to be successful when conducting an audit:
Step 1. Senior Management Approval: The first meeting is with a company president, vice president of operations, or lean manufacturing champion. The typical outcome of this meeting is to identify a factory in the company’s system that might qualify for an audit.
Step 2. Discovery Day At The Factory: A technical team visits the candidate factory to determine if a Process Audit is appropriate. The objective of this day is to make sure that there is a high probability of success. During Discovery Day, the technical team will plan work that must be done to begin a Process Audit. This involves discussions with the plant management and the maintenance department.
Step 3. The Process Audit: Working through the plant maintenance department, controllers, sensors and probes are installed. A phone line or Ethernet connection is required so that data can be monitored via the Internet. Installation is completed in one day. The Process Audit does not interfere with normal factory operations.
Step 4. Continuous Improvement Proposals: Using data gathered during the process audit, several proposals for continuous improvement are suggested. These are reviewed with plant management and senior management.
Step 5. Implement & Document: The auditor is at the factory 24 x 7 via technology—gathering hard data—but the client’s workers must implement process changes. Typically, Profit Finders would meet with the client every 90 days to check on progress and review data.
Step 6. Do It Again: Continuous improvement is a never-ending process. After a Process Audit, the minimum subscription in a Profit Finder's case is for six months. After six months the relationship continues on a month-to-month subscription and a continuous stream of process improvement projects are approved and implemented.
The Journey to a Successful Outcome
In conducting audits over the past year we have discovered that a few simple techniques go a long way towards a successful outcome:
Get your Internet connection in place early. Sometimes providing a simple phone line or Ethernet connection so Process Audit data is readily accessed via the Internet takes longer than anticipated. Get this done early so the start of a Process Audit is not delayed. Often your IT department wants to get involved for security reasons.
Have your maintenance department spend time with the audit team during Discovery Day. They will need to install the controllers and probes that gather valuable data and should be involved at the front end.
Assign a "task force" at the plant with a leader to meet with the auditors every 90 days. An outside auditor can gather data and document improvements, but the task force is at the plant every day. They have to make process changes happen on the shop floor.
Keep senior management involved. Have the task force present results to senior management every 90 days. It is best to have the plant task force take ownership and credit for the improvements realized.
Tom Fabek is the general manager for Profit Finders, headquartered in Strongsville, OH. For more information, contact Joe McHenry, VP of Business Development: [email protected].
