Lean Manufacturing and Plant Design using 3D simulation with Data Analytics
VB Engineering is a pioneer in providing solutions for process improvement with the help of lean tools. We have been offering various 3D simulation services with data analytics and artificial intelligence for Production Improvement using process simulation and virtual reality. Our offerings have enabled our clients towards Continuous Improvement and made them ready for just in time manufacturing. Production improvement is always a challenge including multiple parameters and various fields. The interdependency of the production environment is highly complex and the only responsible person will be the production person for the delay.
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How do I adopt lean methodology is the burning question for every enthusiast in manufacturing technology.
Lean manufacturing has been a best practice across the globe in manufacturing process.
The Filler Machine is the Slowest Machine
The filling machine is the most important machine, as it performs the primary function of the packaging line which is putting the product into the container. It is also in most instances the slowest machine in the production line. Therefore, on most packaging lines the filling machine is called the core machine and the rest of the line is designed around it. Usually the line efficiency is based on the capacity of the filling machine and other equipment is sized to ensure, as far as possible, that the filler does not stop, because of failures on the other equipment. This is done for both efficiency and quality reasons.
Design Principle and Buffer Strategy
We being partner of Manufacturing process simulation software like Flexsim 3d Simulation has been helping the world with best simulation modelling software techniques and data analytics. Especially for food manufacturing dynamic simulation software are very helpful for building the manufacturing simulation environment. The design principle for packaging lines amounts to a buffer strategy, which makes sure that the buffers before the core machine are almost full and the buffers after the core machine are partly empty. This allows the core machine to continue in the case of a failure somewhere else on the line. In other words, the core machine should have products at the in-feed and space at the discharge. So when designing a high speed packaging lines a few variables that influence the design are very important. They are a well-defined Buffer strategy, Production speeds, SKUs and changeovers times, MTBF and MTTR and Line efficiency.
This buffer strategy consists of two complementary elements. The first element is formed by the buffers which provide accumulation. Static accumulation is achieved by putting a real buffer between machines (e.g. an accumulation table or a crate store). Dynamic accumulation is accomplished by the conveyors between the machines.
The second element is formed by production speeds of the machines. The machines on either side of the core machine have extra capacity or overcapacity. This overcapacity ensures that the core machine has products at the in-feed and space at the discharge. This enables these machines to catch up after a failure has occurred. After a machine has had a failure and (a part of) the accumulation is used, then the overcapacity of the machine is used to restore the system back to the situation before the failure. The machine before and after the core machine have extra capacity with respect to the core machine. The machines upstream of the core machine each have extra capacity with respect to the next machine, and the machines downstream of the core machine each have extra capacity with respect to the previous machine. This results in the 'V' -shaped capacity graph for the line stages, with the filling machine at the lowest point. The above figure shows the machine capacity graph (or V-graph) of a typical bottle filling line.
The third element is that today's food and beverage companies often use many different product families or formats, with each product family having a set of specific processes unique to it. SKUs are made up from unique combinations of products (varieties/flavors or qualities), primary packaging formats and secondary packaging formats. For example, in primary packaging, cans and bottles can be different sizes, different shapes and may require widget insertion. Likewise, bottles may require caps or crowns; new glass lines and returnable glass lines frequently merge so common equipment can be shared. Secondary packaging may involve, for example, hi-cones, shrink-wrapping, a wrap-around format, or even more than one of these options. To provide flexibility, it is possible to flow products out of several primary packaging modules into several secondary packaging modules. Optimizing the performance of a packaging facility becomes increasing challenging as combinations increase and the number of SKUs multiply.
The efficiency of a packaging line is the percentage of the actual production versus the possible production, for a given period of time. This is the number of filled bottles or cans versus the possible number of filled bottles or cans in a specified time period. It can also be defined as the percentage of the time that is theoretically needed to produce the actual output (=net production time) versus the actual production time.
The line efficiency is a measure of the efficiency of the packaging line during the period specified, and is calculated as follows:
Line Efficiency = [ (net production time) divided by (net production time + internal unplanned downtime) ] x 100
The break up of all the times involved is shown in the diagram below.
Therefore, the time variables for estimating Line efficiency are 'Net Production Time' and 'Internal Unplanned downtime'. And it is these two time variables used to determine Line efficiency.
If the filler is the core machine, then the filler determines the line.efficiency. Therefore, in the efficiency analysis of packaging lines the focus is on the loss of production time of the filler or the core machine. Note that loss of production on the core machine cannot be recovered, so the production time of the core machine determines the (maximum) output of the line. To therefore increase the line efficiency that considers all the above mentioned complex variables and conditions is not easy easy. It therefore becomes necessary to study the whole packaging line in a 3d visual simulation model, where all these variables and their impact on line efficiency can be examined to bring out the following benefits. Increased throughput and efficiency by understanding where the opportunities for optimizing machine speeds and in defining an optimum buffer strategy. Provides a way to put a packaging system to the test in a risk-free environment, uncovering bottlenecks and starvation in the system and revealing any equipment that is not being fully utilized. Uncertainty and risk associated with major business decisions involving complex processes is mitigated. Validate capital investments that performance goals are realized at the minimum cost. Each machine can be in one of six states·:
1. RunningA machine is running when it is producing, this can be different speeds and with different reject rates.
2. Planned downA machine has a planned stoppage as in the case the machine is stopped for planned maintenance, changeovers, not in use, etc.
3. Machine internal failureA machine has an internal failure when the machine stop is caused by a machine inherent failure. There are often many different failure causes depending on the complexity of the machine.
4. Machine external failureA machine has an external failure when the machine stop is caused by external factors, either caused by another part of the organisation (e.g. no supply of empties, no beer, no electricity, etc.), or by the operator(s) of the line (e.g. lack of material such as labels, cartons, glue, etc.) and waiting time.
5. StarvedA machine is starved (or idle) when the machine stop is due to a lack of cans/bottles or cases. The machine has no input, i.e. the conveyor preceding the machine is empty, because of a reason upstream on the line. Note that some machines can be starved for more than one reasons, e.g. a packer can be starved for bottles and for boxes.
6. BlockedA machine is blocked when the machine stop is due to a backup of cans/bottles or cases. The machine has no room for output, i.e. the conveyor succeeding the machine is full, because of a reason downstream on the line. Note that some machines can be blocked for more than one reason, e.g. a de-palletiser can be blocked by pallets and by crates.
Hence, a machine is either running, or a machine is not running for anyone of above five reasons. A simulation model will therefore predict the amount of time spent in each of the above states and thus enable the designer to find ways to increase line efficiency.
Simulation Model of Packaging Line
Simulation modelling is ideally suited for its unique time-based approach, in conjunction with the ability to reflect the factors that vary, enable simulation models to accurately mimic the complexities of a real-life packaging system. The objectives here being to design the line to maximize the usage of critical equipment and maximize the absorption of minor stops. Faster, more efficient packaging lines are able to respond more quickly to market demands and lower raw material and finished goods inventory. Companies need to take a hard look at the kind of tools used to analyse their core business operations, especially involving large complex packaging lines. A decision based on incorrect results can cost several crores of rupees or even hundreds of crores of rupees, if we are dealing with large operations. The 3d design models built were ensured to be lean six sigma compliant and the integrations of Logistics simulation has taken the overall business game to the next level. The art of "Simulate today to see How is tomorrow" has been mastered by VB Engineering with help of Artificial Intelligence manufacturing software simulation techniques.