COMPARATIVE ANALYSIS OF COSTS AND TIMES OF RED BRICK AND LIGHT BRICK WORK ON THE MADRASAH MALLIMIN MUALLIMAT TAMBAK BERAS JOMBANG BUILDING PROJECT

The problem in implementing the construction of the Madrasah Muallimin Muallimat Tambak Beras Jombang Building is that the available funds and time are limited. The approach regarding the material needed for this building work is light brick compared to other work items. In wall masonry work using light brick/hebel, it is necessary to analyze whether the work time can be faster and whether the price comparison obtained is cheaper. The research method used is Value Engineering analysis to produce cost savings. The results of this research include: a) Based on the results of cost and time analysis for wall items, namely by proposing alternative materials as replacements for the initial materials, resulting in cost savings of Rp. 28,298,995.61, and b) When compared with productivity, a builder is able to complete a red brick wall in 133 days, whereas with light brick wall material a builder is able to complete the work in 66 days. So, in terms of work speed, lightweight bricks are faster than red brick walls.


INTRODUCTION
Provisions or requirements related to buildings and facilities in detail include conditions; qualification; environmental monitoring; floor condition; walls and fittings; division of work areas; and cleaning actions refer to meeting the quality management system for school buildings (Abdullah 2018).To obtain the quality of madrasah buildings according to applicable standards and guidelines, the construction of school buildings must take into account space requirements, size of space, quantitative and qualitative requirements for space as well as accessibility and circulation between spaces.It is hoped that the development carried out will be able to accommodate learning process activities that are supported by comfortable space, accessibility and adequate space circulation.
When constructing a building, the Planned Cost Budget (RAB) is calculated after building construction calculations.This is related to the selection of designs and materials used in planning the construction of the building (Rusman 2017).Budget Plan Building project costs are prepared as optimally and efficiently as possible with quality and quality that remains guaranteed.Multi-storey building construction consists of an upper structure and a lower structure.The wall element is part of the room divider.Some building elements have large costs, but these elements can still be optimized by making them more efficient.
In the budget for a project that has a large value, there are several work segments whose work costs have a large influence on the overall project cost.Costs for these work segments are influenced by several aspects, including looking at materials, work methods, number of workers, implementation time and so on (Hidayat and Ardianto 2011).
The selected work item for the construction of the Madrasah Muallimin Muallimat Tambakberas Jombang building is wall masonry with light brick/hebel material.From a technical perspective, the availability of materials for wall masonry work in current developments is more than 1 material, including concrete panels (which are only used for large volumes, for example the construction of multi-storey apartments and other highrise buildings), red brick, light brick and partitions (use for interior work).With this, the approach regarding the material needed for this building work is light brick compared to other work items (Witjaksana, B., Oetomo, W., & Toha 2018).In wall masonry work using light brick/hebel, it is necessary to analyze whether the work time can be faster and whether the price comparison obtained is cheaper (Jumroh 2018).
The problem in implementing the construction of the Madrasah Muallimin Muallimat Tambak Beras Jombang Building is that the available funds and time are limited.From the results of this value engineering research, it is hoped that if the work items match the initial design after changes have been made to alternative designs, they will be more efficient in terms of cost planning and time allocation required.

LITERATURE REVIEW 2.1. Understanding Value Engineering
In general, the meaning of value engineering is a technique that uses an approach by analyzing the value of its function.The process taken is to emphasize reducing costs as far as possible while maintaining the desired quality and reliability.

Key Elements of Value Engineering
Value Engineering has several capabilities that can be used as a tool for Value Analysis.(Ahmed and Pandey 2016)

Data Analysis
From the data that has been collected, a Value Engineering analysis is carried out to produce cost savings (Atabay and Galipogullari 2013).

Innovation Stage
At this stage, we propose alternative designs to replace bricks using hebel/light bricks.Light brick/hebel has a lighter weight and a smoother surface.The size of the lightweight brick is 60 cm x 20 cm with a thickness of 8-10 cm.

Analysis Stage
Next, the analysis stage is carried out after the innovation stage.At this stage, an analysis of the calculations for light brick/hebel masonry work will be carried out, to determine recommendations for the next stage.
The cost analysis method used is cost analysis using the SNI method.The basic regulations used are SNI 2008 which has been modified and adapted to conditions in the field for material coefficients.Meanwhile, the work coefficient is the same.The basis for calculating the SNI method is to first find the unit price of each job by multiplying the coefficient by the unit price of the materials/workers' wages used.After obtaining the unit price for each job, we can find/calculate the required budget plan or what is often called the Bill of Quantity (BQ) by multiplying the unit price for each job by the total volume for each job on the project.The following is an analysis of the cost calculation for walls using light brick/hebel masonry: a.

Calculation of light bricks per m²:
The size of the light bricks used is 60 cm x 20 cm x 7.5 cm.In 1 m² with 3 mm specs there are: 10,000 cm² ( 60cm + 0.3cm) x ( 20cm + 0.3cm) = 8.16 light bricks From the calculation above, we get 8.16 light bricks to make a wall pair which is equivalent to the size of a ½ brick wall.

b.
Calculation of cost requirements for every 1 m²: Wall Area

CONCLUSION
From the results of the comparative analysis of costs and time for the construction of madrasah buildings above, several conclusions can be drawn: a.Based on the results of cost and time analysis for wall items, namely by proposing alternative materials as replacements for the initial materials, resulting in cost savings of Rp.28,298,995.61.b.When compared with productivity, a builder can complete a red brick wall in 133 days, whereas with light brick wall material a builder can complete the work in 66 days.So, in terms of work speed, lightweight bricks are faster than red brick walls Based on the author's analysis, what should be done in relation to value engineering efforts to construct a building with an optimization theme is that there needs to be integrated coordination between Value Engineering specialists, Project Owners and Planners who examine in depth and comprehensively all the requirements so that the Value Engineering effort can be done well and perfectly.
and Time Analysis of Walls Working walls are building bodies that have a very important role in a residence.Not only does it function as a space divider, but the wall also provides privacy to residents and provides comfort and beauty.The general function of walls is: a) As a barrier to wind, light and water, b) As a separator between rooms that have different functions, and c) As a barrier to noise.The following is the Pareto diagram of the wall work analysis: Source: Author's analysis Figure 1.Pareto diagram Wall work is the main work with a cost of 80% of the total work items.
Each of the elements above is used in the Value Engineering Study or these elements need to be directed when leading the Value Engineering Study for a project.