Heuristics is a concept closely related to digital UX but yes its truely relevant to real world UX. Let's say you are designing a restaurant dining experience. Here's how you could apply some of the heuristics to make the experience more user-friendly:
Visibility of system status: Provide customers with clear information about wait times and table availability, such as by displaying a host stand with a visible sign-up sheet or reservation system.
Match between system and the real world: Use menu items and prices that are easy to understand and reflect what the customer will actually receive, such as by using photographs or illustrations of dishes.
User control and freedom: Allow customers to customize their orders and make substitutions as desired, such as by providing a list of add-ons or modifications that can be requested.
Consistency and standards: Use consistent branding and design elements throughout the restaurant, such as by using the same color scheme or font on menus and signage.
Error prevention: Train waitstaff to accurately take and enter orders, and provide clear instructions for special requests or dietary restrictions.
Recognition rather than recall: Use menu layouts and item descriptions that make it easy for customers to find what they are looking for, such as by grouping similar dishes or using clear, descriptive names.
Flexibility and efficiency of use: Provide a variety of seating options, such as booths, tables, and bar seating, to accommodate different party sizes and preferences.
Aesthetic and minimalist design: Use a clean and simple design for menus and signage that is easy to read and understand.
Help users recognize, diagnose, and recover from errors: Train waitstaff to handle customer complaints and resolve issues promptly and professionally.
Help and documentation: Provide clear and accessible information about the restaurant's hours, location, and menu items, such as by displaying menus on the restaurant's website or providing printed menus at the host stand.
By applying these heuristics, you can create a dining experience that is user-friendly and enjoyable for your customers, and that encourages them to return to your restaurant in the future.
Above example is describing restaurant service design example. So the context can be subjective but yes laws are relevant and applicable to good UX be it tangible or intangible.
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