CSLB C-27 Landscaping ContractorPlanning and EstimatingMedium
A C-27 contractor is preparing a bid for a landscape project that involves extensive planting. The client has a strict requirement for a '90-day plant establishment warranty' from the date of substantial completion. To accurately estimate the cost associated with this warranty, the contractor should MOST critically consider which of the following?
- AThe historical plant mortality rate for similar projects and environmental conditions.
- BThe hourly wage for a crew dedicated to warranty work.
- CThe average cost of plant material replacement in past projects.
- DThe cost of additional irrigation and fertilization during the warranty period.
Show answer & explanationAnswer & explanation
Correct answer: A. The historical plant mortality rate for similar projects and environmental conditions.
The most critical factor for estimating a plant establishment warranty is the historical plant mortality rate. This data, specific to similar projects and environmental conditions, allows for a realistic prediction of the number of plants that will likely need replacement, forming the basis of the warranty cost.
Why the other options are wrong
- B. The hourly wage is a component of labor cost, but the total labor cost depends on the *amount* of warranty work, which is driven by the mortality rate.
- C. While replacement cost is part of the calculation, it's secondary to knowing *how many* plants will likely need replacement, which the mortality rate determines.
- D. Additional care costs are relevant but typically less significant than the cost of replacing entire plants, especially if existing irrigation is adequate.
Plant Establishment Warranty Costing
Estimating the cost of a plant establishment warranty requires predicting potential plant mortality and associated replacement costs. This is best done by analyzing historical mortality rates for similar projects and environmental conditions.
- Focus on predicting plant failure rates.
- Consider species, climate, and site-specific factors.
- Includes cost of replacement plants and associated labor.
Memory trick: Warranty means 'How many will die?' – Check the history.