Critical section problem and solutions ADVISOR: Sir Tanweer Arshad Presentation By: Abiha Ayub 2013-CE-63 December 23,2015 CRITICAL SECTION PROBLEM AND SOLUTIONS Critical Section: The section of code that requires exclusive access to a shared resourse to ensure correct operation. Critical Section Problem: The critical section problem refers to the problem of how to ensure that at most one process is executing its critical section at a given time. Solutions to Critical Section Problem Three solutions to the critical section problem …show more content…
When a process that has exited the critical section re enters, it will give away the turn. If other process is waiting already then it will be the next one to proceed. This algorithm satisfies all three requirements for solution to critical section problem.So this is the correct solution to critical section problem. N-Process Critical Section Problem Now consider a system of n processes (Po, P1 …… Pn-1). Many solutions are available to solve the N-process critical section problem.we consider Bakery algorithm here. Lamports’s Bakery Algorithm Each process in the Bakery Algorithm has an id.These ids are ordered.Before entering in its CS,each process receives a number.The process holding smallest number entera its critical section.If there exists a tie between two processes i.e. process i and j holds the same number and i< (number[i],i))); } Critical section number[i]=0; Remainder section } while(1); Peterson’s algorithm is also extended to be used as a solution to N-process critical section problem Other solutions related to critical section problem Dekker's Algorithm(For solving mutual exclusion problem) Hyman Mutual Exclusion "Solution" Eisenburg and McGuire algorithm Szymanskis’s algorithm
For our first product, the Isolation, consisting of Fries and Drinks, expected demand for the month of August is 373 units. One unit of Isolation needs potato fries, cooking oil, juice powder and water, cup and straw. Total quantity for the fries would be 46,563.30 grams (Fries 125 grams/serving); this will consume a total volume of 12,404.469ml of oil (Oil 33.3ml); for the juice 4,656.33grams of powdered juice along with 5,960.10 ounces of water (Juice powder 12.5g and Water 16oz/order); total cups and straws would then be 373 pieces. In order to meet this demand for the month of August, we must be able to sell at least 16 orders per day.
Let’s assume we have a pallet in manual check and we want to break it down to 80 totes. If this pallet has any problem such as not on shipment, no PO, no barcode then we will create 80 problems from just one problem and then problem become bigger when we inject 80 problems to the line 16 because everybody in 20 stations will pick one of the totes and turn on his blue and waiting for problem solver to fix the problem. This kind of problems definitely will slow down all associate at the line and they will put more pressure to problem solver and water spider while we need to stop creating problem from the manual check.
3) In the Drop_NoFast scenario, obtain the overlaid graph that compares Sent Segment Sequence Number with Received Segment ACK Number for Server_West. Explain the graph.
The company is using a batch shop process flow structure. CBF, Inc. bases its board fabrication process on the average job size or on its typical order. This means that the company proceeds with the manufacturing process in batches so as to meet the specific requirements per order. The typical contract that the company currently gets is 60 boards per order. However, due to persisting factory defects, they manufacture a total of 75 boards per batch in order to compensate for 20% of the boards that they typically reject during the process.
It is a step of defining the goals of the projects and the results are aimed at reaching certain levels of productivity of customer satisfaction. The second stage is measure, and it is the stage of collecting data and facts and evaluating current operational performance. The third stage is analyze with the purpose of developing methods and theories that will best suit the solving of the problem; it is also a stage of detecting cause-and-effect ties of the processes. The fourth stage is improve, it is aimed at generating ideas for reaching the desired process improvement. Finally, there is the control stage that is about monitoring the operations to find out whether the process of improvement is smooth and the problems were solved (Meredith & Shafer,
The main problems that are affecting the company were the high level of labour turnover, below target production rates, high levels of scrap, the employees had little input in the decision making, therefore resulting in low motivation and job satisfaction, and didn't have enough feedback on there performance. Added to this was the conflict between the supervisors and employees in the production and packing areas, and the grading and payment levels wasn't satisfactory to the employees.
One set up operator can get hold of one place at a time and during waiting time, other lose the considerable amount of production. Subsequently, they framed a goal inclined to set up the sequence of work to get the maximum output by utilizing the capacity of the plant. The third step takes into consideration the installation of planning boards. These boards, lists the standard methods for each procedure, work sequence to reflect the order in which the process runs, and standard cycle time to complete a process. Moreover, these boards not only provides the information about the workers in the process but also identify the areas of improvements of the process. Moreover, works as the chief statistics for workers since it helps them to have a better and clear understanding of the process for a flawless vision of the further scope of improvements. On the contrary in another part of the same plant, they found a number of machines seeking attention at the same time. Automation is not always automatic. It requires humanized automation (Jidoka). The machines read the signal of attention by Andon light and need an operator to check the workflow consisting of a warning by each machine. Irrespective of the machine operating
The complexity of demands by the consumers today has resulted to standardization processes and implementation of strict regulations in food manufacturing plants. Every food companies strive for excellence so more people will use their product over their competitor’s. Because of this, systems have been developed by different organizations and by the companies itself to ensure that every product released in the market meets the expectation of the consumers. An example of this system is the Hazard Analysis Critical Control Point or HACCP.
17. Given the state diagram in Figure 4.6, which test case is the minimum series of valid transitions to cover every state?
...tion of the process model. we can also add the integrator to the process model. Moreover , we can give all the poles as real and under-damped (complex pole) from the above case the process model is best fit in third order model P3U in figure 2.8.
GM uses this system by containment, disposition, separation, and classification. Such a system guarantees that any outcome that does not comply with specified requirements is restricted from unintended use, restrained, and dispositioned by the administrators. Accompanied by this quality control is the verifying position where first-time quality and process capacity is advanced (Drew, 2011). Every team member is informed about any modifications in the production process and who and when to summon for assistance in the event of any quandary. Every team is also included in the problem solving to reach any improvement in goals.
Generates a population of points for each iteration, leading to multiple options for solution out of which the best is to be selected.
The core operation of the baking sector is to hold financial assets for its various clients with the firm assurance that the assets can be withdrawn at any time when the need arises but the operation of the banking sector has gone way beyond just holding
Key Resources of this industry include the automation equipment such as the point of sales system that manages the ordering system from customer to kitchen (Chua, 2015). Self-ordering kiosk are made available to some outlets to reduce queuing and waiting time.
Fortunately, during under-graduation, I got an opportunity to detect the optimum path of a process through my project “Design and Development of PCB Dual Head Drilling Machine”. Additionally, I became aware of a new subject called Six Sigma which aided me in intertwining new optimization techniques into my project to make the process effective. I optimized the creation...