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- Daily Definition: Appropriate Durability 适当的耐久性
Daily Definition: Appropriate Durability 适当的耐久性
- Posted in Default
- By admin
- Date March 30th, 2012 12:15
Our aim is for transparency and clarity; we want you to know all of our methodologies and assumptions. Both are listed below and are defined to support development towards restorative solutions. Chinese and English are listed together to avoid communication gaps.
Appropriate Durability 适当的耐久性
People usually assume that the longer a material lasts the better it is. Environmentally speaking, this is not an absolute. Every product is made by locking up raw materials and resources for the product's entire lifespan. All raw materials are finite: product lifespans (durability) should correspond with the time required to grow or create its raw materials.
Consider straw. Assuming one growing cycle, straw grows rapidly and can be harvested once each year. Though straw can be converted into long lasting building materials, this apparent positive can also carry unintended negative consequences. To grow rapidly, straw needs ample nutrients. Locking straw up in building materials removes nutrients from natural growth cycles. Fertilizers are often added to replace missing nutrients and a cycle of nutrient depletion and increased chemical risk begins.
Consider plastics. Assuming petroleum based raw materials, plastics are made from prehistoric origins. These raw materials take hundreds of thousands of years to regenerate. Materials made from petroleum-based plastics should have similar life-spans. Obviously this is unrealistic.
When product life spans match their raw materials' life spans a natural balance is achieved and ecosystems are less prone to being depleted. To calculate appropriate durability, RESET compares product lifespans (warrantied lifespan) against raw material growth or development requirements. The closer this ratio is to 1:1, the better.