Jun 07
StevenDeamAerospace Machining, Lean Manufacturing, Precision Machining, Technology Aerospace Machining, Custom Machined Parts, inventory, Lean Manufacturing, Precision Machining, the seven wastes
In continuing on the Lean Journey, we will talk about the third of seven wastes: Inventory. Historically, inventory was not considered a waste. Large batch manufacturing was a necessity at the beginning of modern machining and manufacturing. Inventory stocks were considered healthy as they indicated that a business could ship to their customers quickly. The story of Inventory becoming considered a waste starts in post WWII Japan. Japan underwent a transformation in their productivity and processes after WWII and began to compete well on the world market. Unfortunately Japan does not have the land area that America does, and therefore the cost of holding inventory was much greater – due to the higher property costs, etc. Toyoda quickly realized that smaller batches, when made efficiently, lead to lower overall costs than large batches do.
In a precision aerospace machining environment, a balancing act is needed. Since CNC Industries machines a large variety of precision parts we cannot afford to have a specialized machine for each part or process that we do. Small machine shops also do not have the luxury of a rolling assembly line between our machines. With these restrictions, and the large amount of processing and manufacturing time that it takes to make a single aerospace part, we are put into a more difficult position that a production facility. We cannot truly operate with no inventory as the goal would be, so we must decide on the ideal inventory to keep on hand.
Precision aerospace machining processes typically have rather long setup times relative to simpler machining processes. This causes the ideal batch size to increase in order to compensate for the lost time on the machine while it is down for setup. At CNC Industries we have worked long and hard to decrease our setup times and have successfully lowered our setup time by 75% over the last 5 years. This has enable us to lower the ideal batch size as well, which in turn allows us to hold less inventory.
In addition to the setup process improvements that we have made over the years, information management is key to efficiently running small batches. Smaller batches will mean more switchovers, more setups, and more jobs running at the same time. With all of these issues, scheduling is both critical and difficult. Job Manager II allows us to have a visual reference of the schedule at any computer throughout our facility and quickly identifies and problems or potential problems at an early stage of the process which allows us to quickly make any necessary adjustments.
May 14
StevenDeamAerospace Machining, Lean Manufacturing, Precision Machining Aerospace Machining, Lean Manufacturing, Precision Machining, the seven wastes, transportation
In continuing on the topic of lean manufacturing in an aerospace machining environment today I will look at how CNC Industries handles the second waste identified in lean manufacturing. The second waste is typically identified as unnecessary transportation. At CNC Industries we look both at internal and external transportation as areas that can cause waste.
The costs of external transportation (shipping) are easy to identify. With external transportation we can easily see the cost of the transportation in dollars as we receive bills from the shipping companies. Any extra shipments obviously incur additional charges and it becomes important to keep the number of shipments required to an absolute minimum. To facilitate this we often work with our outside vendors to have our parts shipped directly from one vendor to another in the case that we have multiple outside operations back to back. As often as possible we find outside vendors that handle multiple processes to save both on the cost of production as well as the cost of transportation. In addition our AS9100 compliant procedures for selecting and purchasing from our vendors allows us confidence in the quality of the parts that we have outsourced.
Internal transportation costs are often more difficult to quantify. Many times companies will both start and stop their efforts on cycle times and overproduction as I talked about in the prior post. Transporting the parts internally more than necessary is also a form of wasted efforts. The cost of moving the parts throughout a facility may seem minor but all forms of transportation take up time and do not add anything to the value of the part. In addition every time a part is moved it is another chance for the part to become lost or damaged.
Extra transportation can occur due to a number of factors in the manufacturing process. If the parts were not scheduled correctly they may need to be moved aside to allow a different part through the machine. Poor routing of the operations that the part takes through the manufacturing process may mean that a part is scheduled through machines that are far apart in the factory. Poor engineering of the part machining process itself may mean that the part has more machining operations than necessary. Any of these items may add additional internal transportation and raise the cost and potentially lower the quality of the part.
Our ERP System – Job Manager 2 – allows us to schedule our parts with confidence that they are engineered and routed correctly. In addition to the initial engineering and routing we have a comprehensive corrective action system and Process Change Request system that allow us to continually improve our processes. Each time we manufacture a part we are able to review and adjust the process and operations as necessary to make the parts even better and more efficiently than the last time.
Aerospace machining and the high mix / low volume work that comes with it creates additional challenges in scheduling. Our engineering processes are designed to quickly work through the numerous issues with new parts and smaller batches. Our scheduling module in Job Manager 2 has a visual scheduling board that allows us to quickly determine the best routing of each part and quickly determine any problems with the processes involved. Job Manager 2 also allows us to analyze each part and quickly find any areas that have lower efficiency so that we may quickly focus our efforts in the appropriate places.
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CNC Industries is a Fort Wayne, Indiana based machine shop specializing in precision CNC machining, fabrication and assembly of application-critical and custom machined parts for the Aerospace, Defense, Medical, Industrial and Transportation markets. The company presently employs approximately 55 people.
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May 14
StevenDeamAerospace Machining, Lean Manufacturing, Precision Machining Aerospace Machining, Lean Manufacturing, Precision Machining, the seven wastes, transportation
due to a few issues on renaming the old post I am repeating the original post with the original title.
In continuing on the topic of lean manufacturing in an aerospace machining environment today I will look at how CNC Industries handles the second waste identified in lean manufacturing. The second waste is typically identified as unnecessary transportation. At CNC Industries we look both at internal and external transportation as areas that can cause waste.
The costs of external transportation (shipping) are easy to identify. With external transportation we can easily see the cost of the transportation in dollars as we receive bills from the shipping companies. Any extra shipments obviously incur additional charges and it becomes important to keep the number of shipments required to an absolute minimum. To facilitate this we often work with our outside vendors to have our parts shipped directly from one vendor to another in the case that we have multiple outside operations back to back. As often as possible we find outside vendors that handle multiple processes to save both on the cost of production as well as the cost of transportation. In addition our AS9100 compliant procedures for selecting and purchasing from our vendors allows us confidence in the quality of the parts that we have outsourced.
Internal transportation costs are often more difficult to quantify. Many times companies will both start and stop their efforts on cycle times and overproduction as I talked about in the prior post. Transporting the parts internally more than necessary is also a form of wasted efforts. The cost of moving the parts throughout a facility may seem minor but all forms of transportation take up time and do not add anything to the value of the part. In addition every time a part is moved it is another chance for the part to become lost or damaged.
Extra transportation can occur due to a number of factors in the manufacturing process. If the parts were not scheduled correctly they may need to be moved aside to allow a different part through the machine. Poor routing of the operations that the part takes through the manufacturing process may mean that a part is scheduled through machines that are far apart in the factory. Poor engineering of the part machining process itself may mean that the part has more machining operations than necessary. Any of these items may add additional internal transportation and raise the cost and potentially lower the quality of the part.
Our ERP System – Job Manager 2 – allows us to schedule our parts with confidence that they are engineered and routed correctly. In addition to the initial engineering and routing we have a comprehensive corrective action system and Process Change Request system that allow us to continually improve our processes. Each time we manufacture a part we are able to review and adjust the process and operations as necessary to make the parts even better and more efficiently than the last time.
Aerospace machining and the high mix / low volume work that comes with it creates additional challenges in scheduling. Our engineering processes are designed to quickly work through the numerous issues with new parts and smaller batches. Our scheduling module in Job Manager 2 has a visual scheduling board that allows us to quickly determine the best routing of each part and quickly determine any problems with the processes involved. Job Manager 2 also allows us to analyze each part and quickly find any areas that have lower efficiency so that we may quickly focus our efforts in the appropriate places.
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CNC Industries is a Fort Wayne, Indiana based machine shop specializing in precision CNC machining, fabrication and assembly of application-critical and custom machined parts for the Aerospace, Defense, Medical, Industrial and Transportation markets. The company presently employs approximately 55 people.
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Apr 30
StevenDeamAerospace Machining, Machining Green, Precision Machining Aerospace Machining, Precision Machining, value added services
Airplanes and other aerospace items need to be ordered well in advance of when they are needed. With long lead times and relatively low volumes – a good jet sells 200-300 units in a year – aerospace companies can get a pretty good read on what their needs will be for the next year or so. To aid our customers of aerospace machine parts we have added several services without increasing our costs to our customers. You can read all about our aerospace services in detail at our aerospace machining page or our aerospace machining definition page.
Our advanced information management capabilities allow us to provide long term stocking arrangements or kanban shipping. In many cases we hold the inventory for our aerospace customers and allow them to draw from our inventory rather than maintain their own inventory. We use various just-in-time production techniques to keep up with our customers’ assembly demands. For one of our customers we deliver parts on an demand-flow basis directly to the assembly line.. In addition we are able to build to an annual forecast, rather than directly to individual purchase orders. Machining the parts to an annual forecast, while we also maintain the inventory, combines to save our customers considerable cost and time.
CNC Industries has the ability to handle many different methods of receiving orders. We have multiple electronic systems, such as Exostar which many aerospace companies use, through which we receive new orders. We also have many customers who send electronic triggers through email to indicate additional requirements.
Some other value added services are more transparent to our customers but are still important. Our standard practice of handling machined parts within our facility is to create unique totes and tubs to protect the parts throughout the entire manufacturing process. We have strict maintenance policies and keep our facilities climate controlled, clean, and well lit. One traditional view of machine shops is that they are dingy, dirty and dangerous to walk around in. When coming to CNC Industries, we expect that you will immediately notice the difference in the care we take in maintaining our facility. Visitors frequently tell us that our facility is the cleanest and most advanced manufacturing facility that they have seen.
Apr 27
StevenDeamAerospace Machining, Precision Machining Aerospace Machining, Custom Machined Parts, evaluating machine shops, Precision Machining
CNC Industries is going to be adding to our main website content. In examining our website we feel that we are not addressing some topics enough on our main site. While I am attempting to add content to our blog to help fill these voids, we are going to be adding many new pages over the next while to fill in the gaps that we see as present.
The first additions that we have made are aerospace machining and the definition of aerospace machining. We are focused heavily on aerospace machining, and we want our website to reflect this. The purpose of having two pages on essentially the same topic is to provide the detail information that not everyone will be familiar with.
While our website is very informative and serves to provide the same information that you will get from most shops, we are not satisfied with meeting the standards. We want anyone that comes to our site to be able to tell right away if CNC Industries will be a good fit to be a supplier for them. Our aerospace machining page is the first in a series of pages that is designed to address this issue.
Our Definitions area of the website will become filled with basic information about precision machining, and other topics which relate to CNC Industries. We will look to explore what defines precision machining and differentiates it from standard machining. We will of course look at what goes into aerospace machining, industrial machining, medical machining, automobile machining, and military machining and why CNC Industries has chosen the focuses that we have.
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