The results of applying Soft Systems Methodology (SSM) show that the nature of the solution and improvement in the problem situation involves some ambiguity. This is due to SSM’s theoretical inadequacy in extending multiple conceptual models to an agreed-upon human activity system. In fact, one of the most important and controversial issues in soft operations research is to ensure how the solution has been obtained and to secure whether the conditions under which the solution has been obtained were satisfied. This article presents the necessary and sufficient conditions for achieving human activity systems as a solution to one of the widely-used methodologies of soft operations research, i.e. Soft Systems Methodology. Similarly, with the aim of reaching a better understanding of the nature of the solution provided by SSM, the soft solution is compared through an example with that of hard systems methodology.

中文翻译：

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软系统方法论求解的充要条件

应用软系统方法论 (SSM) 的结果表明，问题情境中的解决方案和改进的性质涉及一些歧义。这是由于 SSM 在将多个概念模型扩展到商定的人类活动系统方面的理论不足。事实上，软运筹学中最重要和最有争议的问题之一是确保解决方案是如何获得的，以及确保获得解决方案的条件是否得到满足。本文提出了实现人类活动系统作为软运筹学广泛使用的方法之一，即软系统方法论的解决方案的必要和充分条件。同样，为了更好地了解 SSM 提供的解决方案的性质，