APPLICATION OF MULTI ATRIBUT DECISION MAKING ANP MODEL FOR SELECTION OF SUBMARINES COMPATIBLE BATTERIES
3.1. Criteria and Alternatives Determination
Alternatives and Criteria used for submarines battery collection was obtained from brainstorming.
Based on the results of interviews and brainstorming with experts and literature studies that had been implemented, the criteria had been arranged and described in Table 1 along with the alternatives that would be presented in Table 2.
Table. 1 Criteria Used No. Raised
Criteria
Definition/Assessment Parameter
1 Operational Requirements (Opsreq)
Requirements related to usage operational of submarines battery
2 Technical Requirements (Techreq)
Technical Requirements related to design and specification of submarines battery
Postgraduate International Conference, Vol. 2 ICMST 2018 July, 26th 2018
42
Table. 2 Alternatives Used
No. Requirements VARTA BZM
(Jerman)
HAGEN (Jerman)
KSB SEBANG (Korea) I Operational Requirements (Opsreq)
1 Operational √ √ √
2 Complexity √ √ √
3 Maintanancebility √ √ √
4 Spare Part Convenience √ √ √
II Technical Requirements (Techreq)
1 Weight 480 cell x59 kg √ 480cell x 61kg √ 480cell x55kg √
2 Dimension 1 cell 133x29x45 cm√ 145x30x45 cm√ 130x25x45 cm√
3 Power 1,5-2,7V,200 A√ 1,5-2,5V,200 A√ 1,5-3V,220 A √
4 Reliability √ √ √
5 Durability 10-12 th√ 9-11 th√ 10-15 th√
Notes: √ Met the requirements for submarines.
The alternatives shown in Table 2 were the results of Brainstroming about Battery Submarines that had met all operational and technical requirements. The criteria mentioned in Table 3.1 was subcriteria that had been reviewed by experts in which the Operational Requirements (Opsreq) criteria had 4 (four) subcriteria while for Technical Requirements (Techreq) criteria had 5 (five) subcriteria. In Table 3 and Table 4 was a brief description of each subcriteria of the two criteria.
Table. 3 Sub-criteria on Operational Requirements (Opsreq) Criteria.
No. Subcriteria Raised
Definition/Assessment Parameter
1 Operational Operational convenience of how to use the battery from start until finish.
2 Complexity The complexity condition of the battery system that was capable of working with other systems in the submarine includes trouble shooting convenience.
3 Maintanance Convenience of care and maintenance period.
4 Spare part convenience
Convenience to obtain component/spare part for repairing and maintenance.
Table. 4 Sub-criteria on Technical Requirements (Techreq) Criteria
No. Subcriteria Raised
Definition/Assessment Parameter
1 Weight Battery weight that affects overall stability and speed of submarine
2 Dimension Dimension/battery size that affects overall stability and speed of submarine.
3 Power The system and the amount of power that can be generated and integrated with populsion and electrical system of submarine.
4 Reliability Battery reliability at critical times required including reliability of supporting components.
5 Durability Durability and battery life in normal maintenance condition.
The description was summarized in Table 5 below:
Table. 5 Criteria dan Sub-criteria Selection Submarine.
No. Sub-criteria Criteria 1 Operational
Operational Requirements (Opsreq) 2 Complexity
3 Maintanance 4 Spare part
convenience 5 Weight
Technical Requirements (Techreq) 6 Dimension
7 Power 8 Reliability 9 Durability
Postgraduate International Conference, Vol. 2 ICMST 2018 July, 26th 2018
43 3.1.2. The Making of ANP Model Network.
After determining the assessment criteria,
then the ANP hierarchy model as shown in Figure 2 was arranged.
Fig. 2 ANP Hierarchy Model.
Based on the concept of existing models, a model using Super Decisions software was created to identify the existence of relationships that affect logically. There were 9 (nine) sub-criteria that were grouped into 2 cluster criteria: Operational Requirements (Opsreq) and Technical Requirements (Techreq) which had 5 (five) sub- criteria plus 1 (one) Goal. In Figure 3, a Network ANP model using Super Decisions software would be described.
Fig. 3 ANP Model Network using Super Decisions.
The arrows in Figure 3 showed that there was effect. The base of the arrow means that the cluster had effect, while the arrow direction means the cluster that was affected. For example, the elements in Opsreq affected the Alternatives cluster in Figure 3. While the two-way arrow showed the relationship of mutual influence between two clusters or the intended element (feedback). In Figure 3, the two- way arrows on the Opsreq and Techreq clusters indicated that the Opsreq cluster affected the Techreq cluster and vice versa, the Techreq cluster affect Opsreq cluster.
3.1.3. Innerdependence and Outerdependence Relationship
In the ANP network model there were a whole of innerdependence and outerdependence of the clusters and elements in it. The arrows in the picture were the influence, the base of the arrow means the element of the affected criterion, while the incoming arrow means that the element of the criterion that influences. Relationships that occur in determining the relationship innerdependence and
Postgraduate International Conference, Vol. 2 ICMST 2018 July, 26th 2018
44 outerdependence was the result of brainstorming according to the experience of experts as experienced officials.
a. Innerdependence Relationship in Each Cluster.
The following is an explanation of the relationship of each cluster's Innerdependence criterion:
1) Innerdependence relationship in Opsreq. Cluster
Table. 6 Innerdependence relationship in Opsreg Cluster
No. Innerdependence Definition/Assessment Parameter
1 Operation with Complexity
How to operate submarine battery from start until finish, affecting on condition of electrical power complexity system and submarine propulsion.
2 Operation with Maintenance
How to operate submarine battery from start until finishing, affecting on the battery
maintanance type of submarines.
3 Complexity with Maintenance
Complexity of Battery System affecting on the battery
maintanance type of submarines.
4 Complexity with Spare Part Convenience
Condition The complexity of the battery system requires the existence of an easy and good spare part
procurement system.
5 Maintenance with Spare Part Convenience
battery maintanance type of submarines.
requires the existence of an easy and good spare part
procurement system.
In Table 6 innerdependence relationship between the criterion elements present in one Opsreq cluster.
2) Innerdependence relationship in Techreq Cluster.
Table. 7 Innerdependence Relationship in Techreq Cluster
No. Innerdependence Definition/Assessment Parameter
1 Weight with Dimension
The weight condition of the submarine's batteries is influenced by the size /
dimensions of the Battery.
2 Weight with Power
Condition The battery's weight on the
submarine requires enough power to drive the submarine.
3 Dimension with Power
The weight condition of the submarine's batteries requires enough power to drive the submarine.
4 Power with Reliability
Power / daya baterei mempengaruhi kehandalan atau reliability dari baterei Kapal selam.
5 Power with Durability
Power / battery power affects the reliability of the Battery armored submarine.
6 Reliability with Durability
The reliability of submarine batteries is strongly influenced by the durability of submarine batteries.
In Table 7, innerdependence relationship between the criterion elements present in one Techreq cluster was described.
b. Outerdependence Relationship among Clusters.
In addition to the relationship of Innerdependence that occurs within each cluster, there is also an Outerdependence relationship between the clusters in the network, which are described as follows:
Postgraduate International Conference, Vol. 2 ICMST 2018 July, 26th 2018
45 Table. 8 Outerdependence Relationship among
clusters.
No. Outerdependence Definition/Assessment Parameter
1 Opsreq -- Techreq
The subcriteria present on (Opsreq) affects the technical specifications of submarine batteries purchased later on, so as to support the entire mission.
Similarly, it is vice versa with the more
complete and
fulfillment of Sub technical criteria (Techreq) that exists, then the tactical and operational values obtained will be better and higher.
In Table 8, the outerdependence relationship between the Opsreq cluster and the Techreq cluster was explained.
3.1.4. Questionnaire Data Collection.
Preparation of questionnaires were done using reference network model that had been formed. The questionnaire was based on the relationship between the criterion elements of innerdependence and outerdependence and the preference relationship between the criteria along with the goals by pairwise comparison between the cluster or the cluster elements.
This questionnaire aimed to find out about how big the relationship was, based on the assessment of the respondents. The respondents were the experts, who were directly related of the submarine such as Navy officers / direct users
Reasons for selecting different respondents to fill out this questionnaire was because the stakeholder representation was expected to give different point of view so the result would be close to the actual conditions.
This questionnaire led to 2 (two) assessment objectives that were determining the submarine's
alternative priorities and determining the criteria for ultimate/critical selection of submarines.
In answering the questions in this questionnaire, respondents did not need to do discrete weighting by numbers but only intuitively through linguistic variables. The linguistic variable was a variable whose value was words or sentences.
Here, we would use a statement to compare two criteria with five basic linguistics that were equally important, slightly more important, more important, very important and most important. The composition of the questionnaire that had been made can be seen in Appendix I of this Final Project.