As mentioned before, without clear definition of 'OA', it's difficult to say. But if it's Open Access, one main element is the fight against the traditional model of academic publishing where access was restricted. Another could be the role of technology in enabling open access platforms.
Sorry, I'm not sure specifically which 'OA' you are referring to. There could be many things named OA, like Office Automation in a business context, or it could be an abbreviation in a specific field, a character in a story, etc. Without more context, it's hard to tell the back story.
From wincc oa success stories, we can learn a great deal. One aspect is the versatility of the system. It could have been successfully implemented in different environments, like in large - scale power plants or in complex chemical production facilities. This tells us about its adaptability and robustness in handling diverse requirements.
Well, these success stories are like proof of its quality. When other companies see that it has been successful in various projects, they are more likely to trust it. For example, if a big manufacturing company had a great experience with wincc oa in streamlining their production line, other similar companies will take notice. It also gives an idea of the support and functionality that comes with the product.