Descriptive investigations involve collecting data about a system, but not making tests or experiments.
Making tests belongs to experimental investigations.
Descriptive investigations aim to draw conclusions from observations of the fenomena, while experimental investigations design tests that let the researcher to compare results on different conditions with a control situation.
There is also the so called comparative investigations which collect data from under different conditions but do not include the control situtation.  
        
                    
             
        
        
        
 Problem-solving strategies which don't guarantee solutions, but make efficient use of time is Heuristics.
Any problem-solving strategy that employs a practical approach or numerous short cuts in order to provide answers that might not be ideal but are adequate given a constrained timeline or deadline is known as a heuristic, or heuristic technique.
Heuristic methods can be used to expedite the process of obtaining a workable solution in situations when it is impossible or impractical to discover an ideal one. Heuristics are mental efficiencies that reduce the cognitive strain of decision-making. Heuristics are tactics developed from prior experiences with challenges that are comparable.
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Answer:
The concept of the world being flat has extended beyond geographical boundaries to the rapid blurring and demolition of economic ones. Globalisation is not an expansionary mindset anymore and in many cases, a strategic imperative to identify growth opportunities. Organisations are increasingly looking beyond their national markets. E-commerce and the emergence of digital and social marketing practices have led to a level playing field for organisations and customers and have redefined competition. Price wars have become increasingly common. Established brands are increasingly under threat from emerging private label brands.
Given the massive interconnectedness of the business world and emerging models of competition and growth, how can organisations maintain their core underlying brand identity? In addition to competitive market factors, worldwide external shocks like the global recession have also severely impacted businesses at both local and global level. The key question that emerges is that whether there is now a continual need for brands to adapt or face the threat of extinction if they practice consistency.