In the sense that if you have a thorough knowledge on the structure, its materials, the strengths of it is materials the dimensions of all the structural members, then the knowledge level that you have on the existing structure is rather high. When the knowledge level is rather high, uncertainties are reducing and therefore, you can adopt complex analysis methods.
म्हणजे जर तुम्हाला इमारतींमध्ये वापरलेले पदार्थ, त्यांची क्षमता, स्ट्रक्चरल घटकांचे आकार हे सगळं माहीत असेल, तर मग अनिश्चितता कमी होते आणि अवघड विश्लेषण करता येईल.