Analytic Hierarchy Process (AHP) is a method used in structuring, measuring and synthesizing criteria, in particular ranking of multiple criteria in decision making problems. On the other hand, Potential Method is a ranking procedure in which utilizes preference graph ς (V, A). Two nodes are adjacent if they are compared in a pairwise comparison whereby the assigned arc is oriented towards the more preferred node. In this paper Potential Method is used to solve problem on a catering service selection. The comparison of result by using Potential method is made with Extent Analysis. The Potential Method is found to produce the same rank as Extent Analysis in AHP.

The objective of this research is to demonstrate a mathematical technique to analyze the Covid-19 outbreak, particularly with respect to Malaysia. The technique is able to accommodate scarcity, quantity, and availability of the data set. The obtained results can offer descriptive insight for reflecting and strategizing actions in combating the pandemic.

Pairwise comparison of alternatives is common in decision-making procedures. A fuzzy weak autocatalytic set (FWACS) is a technique used in solving multi-criteria decision-making problems. A FWACS represented the comparison of a set of alternatives in form of a directed graph with fuzzy edges. This study discusses the implementation of ranking by FWACS on the evaluation of robots’ kinematic structures. A comparison of results generated by FWACS is made with the results using Potential Method (PM). Sensitivity analysis verifies that the decision made by FWACS is stable and consistent, thus comparable to PM.

The objective of this research is to identify severity zones for the COVID-19 outbreak in Malaysia. The technique employed for the purpose is fuzzy graph that can accommodate scarcity, quantity, and availability of data set. Two published sets of data by the Ministry of Health of Malaysia are used to implement the technique. The obtained results can offer descriptive insight, reflection, assessment, and strategizing actions in combating the pandemic.