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Bearing in mind that this resembles a real task we were once set, what does the model tell you about the task itself?.Try to get the consultants line as close as possible to the target line: what happens to middle grades?.Try to get the middle grades line above (but not too far above) the target as early as possible and keep it there, always slightly above what happens to consultants?.This produces a single score, at the top of the graph. One measure of success is the size of the gap between each dotted line and its target. If this stops happening, select ‘reset’ or refresh your screen (press the F5 button).
STELLA ARCHITECT HOW TO CHANGE THE RUN TIME FOR ONE GRAPH UPDATE
The rest of the graph should update instantly.
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To change the intake numbers, simply draw on the graph (the line will change in five-year chunks).
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The dotted lines show the projected workforce (based on the annual intake figure). You want to get the dotted lines to track the solid lines (as closely as possible). The solid lines are the target numbers for each of ‘middle grade doctors’ and ‘consultants’. To view the outputs in more detail, as numbers, click ‘figures’. To be reminded about the structure, click ‘model’. As you vary this number (by drawing on the graph) you can see instantly the impact on the workforce, over a 30 year period.Įvery System Dynamic model’s behaviour is determined by its structure, please click through ‘the story’ to find out. To make it simpler for the website, in this version, which has been fictionalised (as far as we know, no specialism has these exact parameters) we tell you the main assumptions (how long it takes to train, drop-out and turnover rates), and provide you with only one decision variable which is to determine the annual intake to training programmes. In our client’s model, there were many more inputs that could be varied. This generated some interesting dynamics. In fact, this is a simplified version of an actual model, implemented at a time when the demand for middle grade doctors was rising faster than the need for consultants, resulting from changes in employment law. consultants (whose work pattern includes the need to be ‘on call’).middle grade doctors (who work, mostly in hospitals, on a rota system).In this example, an added factor is that in the workforce of interest (specialist doctors) there are targets (based on safe and legal working practices) for people at two different stages in their career time taken to train (and recruit) students.Typically, the challenge for workforce planners is this: how to decide how many places to offer on training programmes (including degrees), given assumptions about This model is a simplified version of a typical workforce planning model, for which System Dynamics is a good (quite possibly, the ideal) modelling solution, its capabilities match the degree of aggregation and time dimension that are indicated.