# Service Life Prediction and Life Cycle Costs of Light Weight Partitions
## 5 Life Cycle Cost Analysis
### Lifecycle Cost Analysis in Failure Conditions
#### 5.2.2 Life cycle Cost Impacts on Various Failure Mechanisms  
In this part of the discussion, we focus on the economic implications of findings related to the deterioration patterns of different partitions in failure conditions. Table 14 presents a summary of the partition lifecycle cost analysis [$ per m\({}^{2}\)], which is based on the predicted service life expectancy of various failure mechanisms and occupancy conditions. Figure 17 presents a comparison of the impact of the failure mechanism on partitions in various occupancy conditions.  
This analysis provides several insights:  
1. Hollow concrete block partitions emerge as the most stable, in terms of lifecycle costs, under failure conditions. The impact of failure mechanisms only becomes significantly noticeable in intensive conditions.
2. In failure conditions and when the number of negative occupancy factors is less than four, gypsum board partitions show the lowest lifecycle costs. However, it is important to note that when the number of negative occupancy factors exceeds one, all failure mechanisms lead to at least one replacement of these partitions over a 50-year lifecycle. This factor affects the comfort of use in the dwelling, necessitating at least one refurbishment during the building's lifecycle.
3. In intensive service conditions (\(\mu>4\)), hollow concrete block partitions have the lowest lifecycle costs, which is attributable to their relatively good performance in failure conditions, compared to other partition types.  
\begin{table}
\begin{tabular}{l c c c c} \hline \hline \multirow{2}{*}{**Occupancy Conditions**} & **Light** & **Moderate** & **Standard** & **Intensive** \\ \cline{2-5}  & \(\mu\) **= 0** & \(1\leq\mu\) **\textless{} 2** & \(2\leq\mu\) **\textless{} 4** & \(\mu\geq 4\) \\ \hline
**Gypsum board** & & & & \\ \hline Crack at Partition-Ceiling Junction & 23.40 & 23.40 & 32.20 & 65.70 \\ Crack at Partition-Wall Junction & 23.40 & 23.40 & 31.80 & 65.70 \\ Crack around Door Frame & 23.40 & 23.40 & 31.80 & 65.70 \\ Cracks on the Surface & 23.40 & 23.40 & 31.80 & 65.70 \\ Stability of Electrical Installations & 23.40 & 23.40 & 31.80 & 65.70 \\
**Hollow Concrete Blocks** & & & & \\ \hline Crack at Partition-Ceiling Junction & 32.60 & 32.60 & 42.60 & 64.40 \\ Crack at Partition-Wall Junction & 32.60 & 32.60 & 42.20 & 64.40 \\ Crack around Door Frame & 32.60 & 32.60 & 42.60 & 67.00 \\ Cracks on the Surface & 32.60 & 32.60 & 42.60 & 64.40 \\ Stability of Electrical Installations & 32.60 & 32.60 & 41.70 & 58.10 \\
**Hollow Concrete Blocks** & & & & \\ \hline Crack at Partition-Ceiling Junction & 38.00 & 38.00 & 38.00 & 46.80 \\ Crack at Partition-Wall Junction & 38.00 & 38.00 & 38.00 & 46.40 \\ Crack around Door Frame & 38.00 & 38.00 & 38.00 & 46.80 \\ Cracks on the Surface & 38.00 & 38.00 & 38.00 & 46.40 \\ Stability of Electrical Installations & 38.00 & 38.00 & 38.00 & 46.40 \\ \hline \hline \end{tabular}
\end{table}
Table 14: Partition Life cycle Cost Analysis [$ per m\({}^{2}\)] Based on Predicted Service Life Expectancy in Various Failure Mechanisms and Occupancy Conditions.