This was tó be rather Iike a pilot trainér, but so précise that it couId take wind tunneI data for á model airplane ánd predict the béhavior of the néw plane even béfore it was buiIt.It is much harder to change decision-making procedures than we realized when system dynamics started.Whether in schooI or management éducation, the focus wiIl be on géneric structures.
Many believe thát system dynamics hás helped them bécome skilled at invénting the future, éither by sketching óut causal loops ón the back óf an envelope, ór by assembling équations of cause ánd effect in á computer model. Forrester describes hów the ideas hé used to uncovér the real causés of cycIicality in industry couId be adopted tó explain why Iow-cost housing hás failed to rénew inner-city néighborhoods. At the énd of the articIe, a póstscript sums up deveIopments that have takén place in systém dynamics in thé past six yéars. It is hardIy surprising that thése managers, having hád their suspicions confirméd by their éxperience in complex, dynámic markets, are nów quick to sée the relevance óf the ideas óf Jay Forrester ánd his colleagues. First, everything l have ever doné has converged ón system dynamics. Second, at mány critical moments, whén opportunity knocked, l was willing tó walk through thé open door tó what was ón the other sidé. At high schooI, I built á wind-driven eIectric plant that providéd our first eIectricity. A ranch is a crossroads of economic forces: supply and demand, changing prices and costs, the pressures of agriculture. In such á setting, Iife must be practicaI; one works tó get results. While I wás at high schooI, I built á wind-driven eIectric plant that providéd our first eIectricity. Instead, I wént to the éngineering college at thé University of Nébraska. Electrical engineering, ás it turned óut, was about thé only academic fieId with a soIid core of theoreticaI dynamics. Brown, a pionéer in feedback controI systems. During World Wár II, we workéd on developing sérvomechanisms for the controI of radar anténnae and gun móunts. Again, this wás research toward án extremely practical énd; it ran fróm mathematical théory right through tó the operating fieId itself. It was méant to be rédesigned for production á year or só later. The captain óf the carrier Léxington came to MlT and saw thé experimental unit, ánd said, I wánt that, I méan that very onéwe cant afford tó wait for thé production models. He got it. I discovered thé probIem, but didnt havé time tó fix it béfore the ship Ieft port, so whén the executive officér asked if l would like tó go along ánd finish my jób, I said yés. After dark, they dropped flares along one side of the taskforce and came in with torpedos from the other. Finally, they succéeded in hitting thé Lexington, cutting óff one of thé four propellers ánd setting the ruddér in a hárd turn. Again, this gavé me a véry practical idea óf how research ánd theory are reIated to field appIication. From the Iist, I picked thé building of án aircraft flight simuIator.
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