Among lifecycle costs for a sustainable facility, which is typically the highest?

Among lifecycle costs for a sustainable facility, which is typically the highest?

• A. Replacements
• B. Initial costs
• C. Alterations
• D. Operation and maintenance

Answer: (D)

Ongoing operating and maintenance costs typically dominate the lifetime cost of a sustainable facility. The reason is simple: these expenses accrue year after year for the entire life of the building—covering energy and water bills, routine servicing, repairs, replacements of consumables, and inspections. Even if a sustainable design reduces energy use or extends the life of equipment, the total of these yearly costs often outweigh the one-time upfront investment and the episodic costs of major replacements or renovations over the building’s life. Initial costs are paid once, so they don’t accumulate in the same way as O&M. Replacements and alterations happen at intervals and, while significant, are infrequent compared with the steady drain of operating expenses. Therefore, the cumulative impact of operation and maintenance generally exceeds the other categories, making it the largest component of lifecycle costs for a sustainable facility.

Ongoing operating and maintenance costs typically dominate the lifetime cost of a sustainable facility. The reason is simple: these expenses accrue year after year for the entire life of the building—covering energy and water bills, routine servicing, repairs, replacements of consumables, and inspections. Even if a sustainable design reduces energy use or extends the life of equipment, the total of these yearly costs often outweigh the one-time upfront investment and the episodic costs of major replacements or renovations over the building’s life.

Initial costs are paid once, so they don’t accumulate in the same way as O&M. Replacements and alterations happen at intervals and, while significant, are infrequent compared with the steady drain of operating expenses. Therefore, the cumulative impact of operation and maintenance generally exceeds the other categories, making it the largest component of lifecycle costs for a sustainable facility.