Horseshoe theory - Wikipedia
Posts about Theory of Constraints written by tcagley. XP works based on the Theory of Constraints in Extreme Programing Explained, Second Edition (). .. When Alex meets with Ralph he finds that has been trying to use the process . Dec 10, The Theory of Constraints, created by Eliyahu M. Goldratt and is most limiting the rate at which we complete our work in order to meet our goal. testing activity forward in the process and in the most extreme circumstance. Proponents of Horseshoe Theory argue that the extreme left and the extreme right are closer to each other than either is to the political center. In political science and also popular discourse, the horseshoe theory asserts that the far-left The two extremes of the political spectrum end up meeting like a horseshoe, at the top.
The issue turns out to be that parts are often not immediately unloaded after the heat-treat process due to timing and staffing issues.Theory of Constraints : An introduction
The furnace is loaded and then heats the parts for four or five hours before being ready to be unloaded. In order to maximize efficiency, people are assigned other jobs during the heating process, which causes the timing and resource contention problems.
The heat-treat bottleneck is not being run at or near maximum capacity, which reduces the output of the plant. Note that the problem with the heat-treat process was identified through measurement and analysis of the data.
The problem Ralph identified is a reflection of the ripple effect of other changes and that as the process is refined better information is exposed. Alex and Rob Donavon, the production supervisor, meet loudly over the discovery that the heat-treat process is not being used to maximum capacity.
The discussion unearths that similar timing and resource problems are happening at the NCX, even though the new work rules ensure that no breaks are taken during machine set-up. The problem occurs when the machine stops and before the set-up begins again. Hiring, including layoff callbacks, are currently frozen, therefore Alex and his team need to rob Peter to pay Paul. A bit of foreshadowing — the impact of change can ripple through other process steps. In an overall sense, the efficiency of both the heat-treat and NCX steps as measured in terms of cost per unit is being reduced while the overall effectiveness of the plant is being increased by the changes being made.
One of the other steps taken as part of the new changes to staff the bottlenecks is that Alex has let the foremen in the heat-treat area know that they will be rewarded for changes that improve the output of the process.
The third-shift foreman makes two process changes that have a significant impact. He has broken high priority orders down and batched parts that require the same treatment together, and has prepped the material so that it is staged to be loaded as soon as the furnace is ready. He also points out to Alex that with a little help from engineering they can modify the loading process so that parts can be wheeled in and wheeled out rather than lifted in an out by a crane.
The foreman is immediately shifted to first shift to work with engineering to make the changes and document the process.
Theory of Constraints | Software Process and Measurement
Chapter 24 begins on an up note! The plant has been able to ship more orders with a higher sales value than ever before, while reducing the level of work-in-progress.
In light of the continuing celebration Alex is driven home by a female member of staff, which leads to complications with Julie, his estranged wife, who just happens to be waiting to surprise Alex. Changes to the process to focus on making the parts that flow through the bottleneck more available have caused process steps for other parts to become bottlenecks.
Alex tracks down Johan and briefs him on what they have done. Johan suggests a visit to see what has been accomplished. Johan rarely solves the plants problems directly, but rather asks the questions that lead to a solution. The Goal provides a great side benefit of reinforcing one the central ideas of Agile coaching. The pursuit of a common political agenda is a trend discernible at both extremes of the political spectrum.
The Theory Of Constraints In Agile
Though this phenomenon manifests itself primarily through content-related overlaps, I believe there are good reasons to refer to it as a red-brown alliance. Its commonalities are based on shared anti-liberal resentment. Of course, there remain palpable differences between far left and the far right. But we should not underestimate the dangers already posed by these left-right intersections, as well as what we might lose if the resentment-driven backlash becomes mainstream.
Criticism[ edit ] The horseshoe theory has been criticized not just by people on both ends of the political spectrum who oppose being grouped with those they consider to be their polar opposites, but also by those who see horseshoe theory as oversimplifying political ideologies and as ignoring fundamental differences between them.
Simon Choat, a senior lecturer in political theory at Kingston Universitycriticizes horseshoe theory from a leftist perspective. He argues that far-left and far-right ideologies only share similarities in the vaguest sense in that they both oppose the liberal democratic status quobut the two sides both have very different reasons and very different aims for doing so.
Choat uses the issue of globalization as an example. Both the far-left and the far-right attack neoliberal globalization and its elites, but have conflicting views on who those elites are and conflicting reasons for attacking them: For the left, the problem with globalisation is that it has given free rein to capital and entrenched economic and political inequality.
They want an alternative globalisation. For the right, the problem with globalisation is that it has corroded supposedly traditional and homogeneous cultural and ethnic communities — their solution is therefore to reverse globalisation, protecting national capital and placing further restrictions on the movement of people.