Study the given estimates for the construction of a proposed hospital building and identify the estimate that does NOT belong to the category of preliminary estimates. 

Explanation:

There are different types of estimate

Approximate or preliminary estimate: The approximate estimate serves as the preliminary evaluation of various project aspects, aiding in financial decision-making and administrative approval. For revenue-generating projects, probable income is included, while non-commercial projects are assessed based on necessity, utility, prospects, and financial availability.

        Different methods of approximate estimate are given below.

1. Plinth area method: The construction cost is calculated by multiplying the plinth area with the plinth area rate, where the area is derived from the multiplication of the length and breadth (outer dimensions of the building).
2. Cubical content method: This method, commonly applied to multistoried buildings, is more accurate than the plinth area and unit base methods. The cost is determined by multiplying the total volume of the building (obtained from length × breadth × depth) by the Local Cubic Rate, excluding costs for features like string course, cornice, corbelling, etc.
3. Unit-based method: This method calculates the structure's cost by multiplying the total units with the unit rate for each item. For schools and colleges, the unit is defined as one student, and for hospitals, it is one bed. The unit rate is derived by dividing the actual cost of a nearby similar building by the number of units.

Detailed estimate: This method of estimation is precise, involving the subdivision of the entire building work into individual items. The cost is determined by multiplying the numbers of each item by the respective completion rate.