Decision-Making Analysis of Koi Pool Pump Selection using ….

ABSTRACT


INTRODUCTION
Business competition is getting tougher with the entry of various kinds of new competitors.To win the business competition, it needs to be innovation and continuous improvement for business continuity.A healthy business can be seen from the owner's ability to manage all incoming information to be analysed and used as a basis for decision-making.This decision-making applies to all small and medium-sized businesses [1], [2].One of them is King Aquatik Ambarawa, a micro business which is engaged in the cultivation of freshwater ornamental fish.The key to fish farming is how a farmer maintains water quality [3] [4] To maintain water quality, a pond pump is needed which functions to pump water, produce oxygen concentrations in the water, create water waves, and reduce ammonia, nitrate, and nitrite levels [5].The availability of various koi pond pumps on the market with various advantages is a consideration in maintaining water quality [6] [7].The need for koi pond pump is a type of Electric Submersible Pump (ESP) [8].
Due to the need for a koi pond pump as described above, as well as the availability of various koi pond pumps on the market with various advantages, where this diversity makes it difficult for business owners to determine the right koi pond pump according to their business needs, a problem arises, namely which koi pond pump is the best to choose?To solve the above problems, a method is needed to be used as a solution, one of which is by the way of decision-making analysis [6], [9]- [15].
AHP is one of the decision-making analysis methods that use human perception, which understands the problem posed as the main information input [10].The advantages of the AHP method are that it can solve multi-criteria problems with one-way absolute without any fuzziness hierarchies, rational weighting, and relatively short time.COMPILER, Vol. 12, No. 1, May 2023 Previous studies were very limited on the development needs and success of fish farming.Even though it is known that the success of fish farming is very much influenced by some factors.A previous study [6] used AHP to select the type of ESP pump in oil drilling on 3 factors.In addition, the research on fish farming [10] focuses on the selection of fish suppliers, which considers price, service quality and fish specifications.This study explored expert preferences to determine the pump selection factors in koi fish farming.

RESEARCH METHOD
This research was developed using the AHP method.The data needed are secondary data obtained from literacy and previous research and primary data obtained from observations and questionnaires to respondents based on the volume of the pool and the required discharge.The stages of the research are as follows:

Literature Study and Preliminary Observation
Conduct reference by finding the references which is related to the AHP method and submersible pump case studies.

Problem Identification and Formulation
Define the problem and describe the process to solve the problem.

Determination of Research Objectives
Determine the alternative solutions for selecting koi pond pumps based on the types of machines on the market.

Data Collection
Collect the secondary data derived from literature and primary data based on field observations and discussions.

Identification of Criteria and Alternatives
Identifying criteria and alternatives start with secondary data collection, namely research [6] regarding ESP pumps in the Zaryka field with the criteria for product durability, experience and reputation, and the amount of maintenance.The next step is the process of collecting primary data with resource persons, business

COMPILER
owners who have been working in the field of koi enlargement since 2017, and workers who have taken care of koi ponds since 2018, to find out the suitability of the criteria in selecting a koi pond pump.On this basis, criteria and alternatives are determined according to the needs analysis based on pond volume calculations as a basis for decision-making.

Hierarchy
Based on the identification of criteria and alternatives, the next stage is a description of the problem as a decision-making hierarchical tree.

Data Processing
Calculate the primary data from the pairwise comparison questionnaire results.

Pairwise Comparison Questionnaire
At this stage, respondents were asked to assess decision preferences based on objectives, criteria, and alternatives using a pairwise comparison questionnaire.This assessment uses a Likert scale that is used for the AHP method, which has a value from 1 to 9 Table 1.Value Rating Scale Information 1 Criterion/Alternative A is as important as Criterion/alternative B 3 A is slightly more important than B 5 A is more important than B 7 A is clearly more important than B 9 Absolute is more important than B 2,4,6,8

Weight
In this case, the respondents involved were business owners and senior employees.Then the respondent's assessment is calculated using the Geometric Mean with the following formula: ij=(1,2,3,….,) 1/n .After that, the geometric mean calculation results are entered in each column according to the pairwise comparisons.By calculating the eigenvector values of each pairwise comparison matrix, the result of eigenvalues are the weights of each element which will be used to determine the priority of elements in the lowest hierarchical structure until it reaches the top hierarchical structure.

Consistency
Next is the consistency test to test the respondents whether in filling out pairwise comparisons are always consistent or not.A matrix is considered consistent if the Consistency Ratio (CR) value is <0.1.While it is inconsistent if the allowed value is 10%.The CR formula is below

Analysis and Discussion
Determine the weight of the criteria, sub-criteria, and alternatives based on expert preferences to provide a proposed consideration in deciding on selecting a Koi pump.

Conclusion
State the hierarchical form level 1 (one) priority criteria, level 2 (two) prior sub-criteria and level 3 (three) alternative priority options.

RESULTS AND ANALYSIS
In the process of deciding to choose an alternative koi pond pump, it is carried out using the Analytical Hierarchy Process approach in several stages of the process as follows:

Criteria and Alternative Decision
From the results of observations and interviews, identification of criteria, sub-criteria and alternative Koi pump engines were obtained the decision making consideration.The electricity consumption of a pump is measured in watts Endurance (Durability) The durability of the use of the pump up to a relatively long time Ease of Maintenance (Maintenance) Ease of maintenance of the pump for a certain time

Koi Pond Pump Alternatives Eheim CON 12000
The need for water debit is 12000 liters/hour Atman MP-12000 Speed ability to decompose waste Resun PG12000 Economical price Yamano AC-T12000 Voltage 220V

Hierarchy
The decision-making process based on predetermined criteria, sub-criteria, and alternatives is described as a hierarchy to make it easier to compare judgments at each level of the hierarchy.The following is the Koi Pond Pump selection hierarchy.

Figure 2. Decision Making Hierarchy
In the hierarchy above, you can see the relationship of each criterion to the sub-criteria and the alternatives that are decided to be material for consideration in selecting a koi pond pump.

Level Priority
Local priority is the result of pairwise comparisons from level 1 (between criteria), level 2 (between subcriteria), and level 3 (alternative to sub-criteria).The following is an overall table of these local priorities:  3 are the weight of the comparison of each criterion level, the sub-criteria level to the criteria and the alternative level to the sub-criteria level.This weight value indicates the level of importance at each level of expert preference.

Overall Priority
From the local priority data, the overall priority is weighted by multiplying the local priority by the priority level above it.Here is the overall priority table.Ease of Maintenance 0,0540 Eheim CON12000 0,0081 Atman MP12000 0,0032 Resun PG12000 0,0251 Yamano ACT12000 0,0176 From these results, it can be said that brand reputation has the most influence on the selection of koi pond pumps with a weight value of 0.4215.The results of previous research [8] indicate that there is a positive influence on brand reputation and product quality on repeat purchases (repurchase intention).

Alternative and Criteria Weight
Determining the weight of each overall alternative can be calculated by adding up all the weights for each alternative koi pond pump, resulting in weights and ranks as shown in the table below: Table 5. Alternative Weights and Ranks Alternatives Weight Rank Eheim CON12000 0,4105 1 Resun PG12000 0,2318 2 Yamano ACT12000 0,2025 3 Atman MP12000 0,1551 4 These results provide information that the best koi pond pump to be chosen by King Aquatic Ambarawa is Eheim CON12000 because overall the criteria and sub-criteria for this koi pond pump have the highest value compared to the other three koi pond pumps.In addition, Eheim CON12000 is believed to be superior among koi cultivators.It is because due to the comparable quality and price, the ability to perform low electric power with a high water flow rate, and good product durability due to the use of high-quality materials.
The selection of koi pond pumps based on each criterion can be analyzed in the table below:  5 and 6 are the results of the overall weight of alternatives and criteria.Brand reputation criteria have the highest weight.It shows that the preference experts believe the brand is still an important point in decision-making 12 ponds for the purpose of growing koi fish, a land area of about 20m 2 and a total capacity of 300 koi fish measuring 10 to 15 cm, then in the case of choosing a koi pond pump for Aquatic Ambarawa, the Eheim CONI2000 is the choice with the highest weight of 0.4105.Eheim CON12000 is believed to be superior in koi cultivation circles because of its comparable quality and price, as well as its ability to perform low electric power with high water flow rates, as well as good product durability because it uses high-quality materials.

CONCLUSION
Koi pond pump criteria weight sequentially is Brand Reputation (0.4251), Product Design (0.2661), Power Consumption (0.1102), Durability (0.1074), Ease of Maintenance (0.054), and Price (0 .0409).The best alternative weight for choosing a koi pond pump for a case study on Ambarawa King Aquatic Micro Business in first place is Eheim CON12000 with a weight of 0.4105, the second place is Resun PG12000 with a weight of 0.2318, the third place is Yamano ACT12000 with a weight of 0.2025, and the fourth place is Atman MP12000 with a weight of 0.1551. .