When it comes to products, Reliability rates high in importance. Your Calculator’s ability to perform and maintain its functions during everyday use, as well as extreme use or under unexpected circumstances, is important when making purchase or repair decisions.

How will your Calculator hold up over time and withstand the wear and tear of constant or long-term use? A product with strong Durability is a product that was made to last and provide a good ownership experience over it’s lifetime.

Most Calculator owners intend to keep their Calculator in good working condition. Knowing up front if the Maintenance or repair of a product is easy or difficult can have a profound impact on your decision to make a purchase.

Calculator's that are purchased and meet or exceed expectations usually share the trait of good Performance. Feeling that a product was worth the purchase because it does everything you expected, and does it well, is a clear indicator of a product that truly performs.

How hard is this Calculator to operate? If purchased, would tons of time be lost trying to figure out how it works? Simply put, Ease of Use is a measure of how easy a product is to use. Having this knowledge prior to purchase can help avoid buyer’s remorse.