LEAN Digital Assignment
- 1. MEE 1016 Lean Enterprises and New Manufacturing Technology Digital Assignment 2 Name: A.Santhosh Reg. No.: 15BME2079 Slot: G2 1. Identify the seven types of lean wastes in a Hotel Defects. This includes all time spent doing some dishes or cooking incorrectly and inspecting or overcooking for fixing taste. One example of defect waste is the time spent looking for an item like ingredients use to put in the cooking. Over-production. This includes doing more than what is needed by the chef or doing it sooner than needed. A broad example of this is cooking dishes more than required before the customer gives his/her order and cooking dishes for lunch and dinner in advance then when it is actually needed. Transportation. Unnecessarily moving dishes cooking utensils or materials throughout a system is wasteful. This type of waste is evident when the kitchen and entire hotel has a poor layout, such as a work table located a long distance from the gas range. Waiting. Waiting for the next event to occur or the next work activity can eat up time and resources. Customers waiting for giving an order is a sign of waste, as is employees waiting because their workloads are not level. Inventory. Hotel create waste when they incur excess inventory costs, storage and movement costs, spoilage and waste. One example is letting supplies like cold drinks, bakery items, vegetables etc expire and then disposing of them, including out-of-date food packages. Motion. Do cooks and waiters move from room to room, floor to floor and building to building more than necessary? That accounts for one type of waste. Cooks, waiters and sometimes customer may walk miles per day due to a poor hotel layout, for example. Over-processing. This describes work performed that is not valued by the customers or caused by definitions of quality that aren't aligned with customer’s needs. One example is extra data stamps put onto forms, but that data never being used. Human potential. This waste is caused when cooks and waiters are not engaged, heard or supported. They may feel burnt out and cease sharing ideas for improvement. 2. Identify the seven types of lean wastes in an automobile workshop Defects. One of the most easily recognizable wastes in lean manufacturing is the production of Defects. Examples of Defects in automobile workshop include waste such as scrap parts, products that require rework, or assemblies that are missing details. Defects are often considered to be one of the most significant automobile workshop wastes because they can actually lead to the generation of additional wastes such as Overproduction, Transportation, and Excess Processing.
- 2. Over-production. Of all the wastes in automobile workshop, Overproduction has, by far, the most negative impact on success. Overproduction occurs any time more parts or products are produced than the customer is willing to purchase. Like the production of Defects and subsequent Excess Processing, Overproduction can also lead to the generation of additional lean manufacturing wastes such as Waiting, Inventory, and Motion, consuming vast amounts of time and resources. Transportation. Moving product costs money, which is why Transportation is classified as a manufacturing waste category. Unless value-added transformation is performed to the product or material during transport, the Transportation of a product or material is wasteful activity. Great amounts of resources and time are consumed moving material while no value is being added to sell to the customer. Transportation leads to increased Motion lean waste because resources are required to move without generating value. Waiting. Waiting is a reference to inaction that adds cost to a product being produced for a customer. This occurs because overhead costs continue to increase during the time the product waits to be transformed. When product waits, no value is being produced but the cost of overhead operations continues to grow, which strips potential profit from the sale. Waiting not only destroys material and information flow, but also generates excess Inventory. Inventory is a automobile workshop waste because it is value that is being held at a cost. In the most literal sense, Inventory is valuable product or material that is waiting either to be sold to the customer or further transformed into something of greater value. The entire time a product sits in Inventory, its profit margin is reduced because overhead must be paid to maintain the product in Inventory. Maintaining Inventory requires the addition of Motion and Transportation wastes. Motion. When Motion occurs, value is not added to a product or material being used in automobile workshop. Motion can be either people or machine, but is most often a human resource whose effort and time are being wasted. Inefficient shop floor layouts, and improper equipment can contribute to unnecessary motion. The employee’s efforts are not only being wasted, but Motion can also result in physical injury to employees which results in even greater cost to the business. Motion waste is closely related to wasted employee potential, commonly referred to as Non-Utilized Talent. Over-processing. When products do not conform to a customer’s requirements, the products must be repaired or remanufactured to satisfy the customer’s needs. If the customer’s requirements are not clear, more work may be performed during the creation of the product than is actually required, (such as fine polishing surfaces so they look shiny), even though the customer did not request it. Repairing, remanufacturing, and over processing are examples of lean manufacturing waste referred to as Excess Processing. Human potential. The only lean manufacturing waste that is not manufacturing-process specific, but rather automobile workshop related, is Non-Utilized Talent. This type of manufacturing waste occurs when management in a manufacturing environment fails to ensure that all of their potential employee talent is being utilized. In relationship to Motion waste, if an employee is aimlessly moving material around the production area without adding value their efforts are being wasted where they could be performing value-added activities instead. Non- Utilized Talent also refers to management’s ability to utilize the critical thinking and continuous improvement feedback from employees to improve a lean manufacturing process. If management does not engage with manufacturing employees on topics of continuous improvement and allow employees to influence change for the better, it is considered manufacturing waste.
- 3. 3. Explain how, when and where PDCA cycle can be used? Go through a case study of PDCA implementation in a manufacturing / service organization and give your understanding of the same explain why and how it has been done. Also mention the results obtained through the PDCA implementation. PDCA (Plan Do Check Act) PDCA (plan-do-check-act, sometimes seen as plan-do-check-adjust) is a repetitive four-stage model for continuous improvement (CI) in business process management. How PDCA cycle is used? Plan: Define the problem to be addressed, collect relevant data, and ascertain the problem's root cause. Do: Develop and implement a solution; decide upon a measurement to gauge its effectiveness. Check: Confirm the results through before-and-after data comparison. Act: Document the results, inform others about process changes, and make recommendations for the problem to be addressed in the next PDCA cycle. When PDCA cycle is used? PDCA cycle is used in any company or a institution when there is a need of improvement in the output of a company or an institution and to fetch the following qualities by the institution: 1) Process Improvement, 2) Quality Management, 3) Project Control, 4) Performance Management, and 5) Organizational Competitiveness through Agility. Why PDCA cycle is used? Process Improvement The PDCA methodology is a continuous loop of planning, doing, checking or studying, and acting. This makes PDCA the ideal model for: Continuous improvement: The repeated PDCA cycle drives forward process improvement irrespective of the goals and shuts the door on complacency Implementation of new projects or processes: The inbuilt plan, test, and feedback mechanism of PDCA allows fixing snags and improving things at the process implementation stage, without putting entire resources or reputation at stake. Process trails: The PDCA cycle entails checking the implemented changes for consistency before adopting it across the board Utilizing the plan-do-check-act cycle allows breakdown of a project into small manageable steps and allows gradual incremental improvements. Change Management PDCA not only encourages development of innovative and breakthrough changes to ensure quality and performance improvement, it also help manage change effectively.
- 4. The PDCA model incorporates what needs changing to the methodology of continuous improvement. The change process under PDCA entails incorporating the parameters that require change in the planning component (plan), implementation of a prototype (do), the review of the prototype for suitability and performance (check or learn) and widespread implementation or successful implementation of the prototype (act). This contributes to integrating the change management process within the normal day-to-day organizational activity, making the change process seamless. Quality Management One of the major uses of this process is for quality management. The continuous feedback loop of PDCA allows analysis, measurement, and identification of sources of variations from customer requirements and enables taking corrective action. PDCA cycle as a part of continuous improvement in the production company a case study There is a company from the sector of small and medium-sized enterprises (small, employing up to 49 people) engaged in the production of decorative elements made of plastic. Its basic assortment mainly includes mainly picture frames and paintings in a variety of shapes and colours, as well as gift baskets also available in different colour combinations and different dimensions. The company also produces containers for small items and gadgets for individual orders (e.g. key chains, pens, lighters). The main customers are wholesalers and shops with ornaments and souvenirs, as well as the company contracting specific gadgets. The company has a machine park consisting of injection molding machines, pad printers machines and robots. The production takes place in the slots and it can be described as small lot production. In order to improve the process and quality of products, the research company has implemented a quality management system according to ISO 9001:2015. Given the increasing demands of customers and the presence of competition on the market the company is also trying to improve every element of its business through the use of selected tools and methods of quality management and lean management techniques. In Step I - Planning (P) : A company focuses on the detailed identification of the problems which occur during the production of picture frames, and determines the order. It was noticed that problems were connected with discoloration on the surface of frames (because if it a frame did not look appropriate as its colour was not distributed evenly, in some places there were bright red streaks) and scorches (black and brown lines and tracks). After identifying, "naming" these problems, the next step was to collect data about the process. Discrepancy resulting from discolorations on the surface of the frame occurred during the process of mixing the pigment and was visible on the front of the frame, and at its top. While the scorches appeared in one location in the frame which proved that they do not result from the drying process, but they probably during the injection material into the mold. In order to determine the causes of such a situation and to minimize the probability of discrepancies, the analysis of the causes of problems was necessary, as was the need to devise a plan to implement solutions. In the "Machine" group there were causes identified which can be associated with the occurrence of retention in the plasticizing unit and the nozzle sealable a needle and with a small diameter nozzles and improper adhesion of the injection machine nozzle. The "Material" group specified the following causes which may affect the scorches on the surface of the photo frame: different size of pellets, too high content of regrind, and insufficient resistance of the polymer to thermal loads. "Technology" causes are related to a very high speed injection molding, high temperature of the cylinder and a high channels temperature. Last group - "structure" (form) revealed the following causes: incorrect construction of channels, too large differences in temperatures on the hot zones channels and too small channels diameter in the form. After identifying the causes which might have affected the problems, the working group also began searching for potential solutions by means of brainstorming. A plan to implement solutions was devised and made visible on the shop floor, in the form of a clear and explicit for each employee. In the plan (created as a table) found an accurate description of the solutions could be found, the place
- 5. of the implementation, the person responsible for the execution of those tasks and the planned beginning and end of these activities. The plan how to implement the solutions also included a description of the possible outcomes. Step II - Doing (D): which is connected with implementing the elaborated plan was associated with the removal of the causes of problems happening during in the production of photo frames. An action scheme to help in accomplishing the designed task was created. In the case of discrepancy connected with discolorations on the surface of photo frames, the following actions were undertaken: the pigment dispenser was checked in terms of its size and accuracy. A small failure which could contribute to irregularity, and uneven pigment distribution was noticed. There was no excessive static electricity of the pigment. Slightly raised temperature of the alloy and the injection speed was increased. It was checked whether the pigment is appropriately adjusted to the material and size of the granules of the tested material and pigment. The analysis of the causes of discrepancy related with scorches on the surface of the photo frame focused on the injection machine nozzle, checked diameter and adhesion, as well as the retention space in the plasticizing unit. Similarly, in the case of the reasons that could affect the discolorations of the surface of the frame, a verification of the size of the granules was done. Adequate resistance of polypropylene on included in the process heat load was certified. The temperature channels were slightly exceeded and there were differences in temperature on the hot zones channels. Consequently, the temperatures were corrected. In step III - checking (C) it was checked, if the applied actions brought expected effect of minimizing the number of discrepancies of the photo frames. The results, presented in the implementation plan, assumed a reduction in the number of nonconformities number by 60% after the first implementation of solutions. After measuring, using control charts by number of nonconformities np, a decrease in the number of faulty products by more than 60% was shown. The objective set in I step of Deming cycle was reached which made it possible to proceed to final step IV - act (A). Step IV - act (A) uses the implemented solutions. After the step III proved that they had brought the expected result which started their standardization and monitoring of their activities. In the production hall instructions for employees were displayed in a visible and comprehensible form. Moreover, improvements to the existing procedures for the injection process of the photo frames were introduced. In these procedures, besides fixed points, were precisely characterized ways to solve problems and persons responsible for their implementation were specified. Result PDCA is contained in a circle and endless which allows to consider all the implemented and applied solutions an indicator for further improvement activities. The company has achieved its objective, which reduced the number of discrepancies by more than 60%, but this should not lead to a halt in the improvement of the production process of photo frames. The next step should include development of a new action plan, or reusing Deming cycle as a cycle for improvement, by which the number of faulty photo frames is reduced compared to that achieved in the shown example. The case study presented in relation to the company from the SME sector proves that the PDCA cycle is a series of versatile, simple to implement and can be successfully used in any company that uses or intends to apply the principle of continuous improvement in respect to some or all areas of its business. It helps to overcome internal barriers resulting form, for example, wrong management and to minimize the impact of external barriers.