A framework for selection criteria of wet mortar pumping systems in Brazil

Alves, Alessandro; Griese Junior, Roberto Otto; Caoduro, Natália Paranhos; Lourenço, Sérgio Ricardo; Cassiano, Douglas Alves

doi:10.1590/0370-44672023770107

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Civil Engineering • REM, Int. Eng. J. 77 (3) • 2024 • https://doi.org/10.1590/0370-44672023770107 copy

A framework for selection criteria of wet mortar pumping systems in Brazil

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Despite presenting several advantages in relation to the mortar coating performed by hand labor traditionally carried out in Brazil, there is little knowledge available about mortar pumping systems. Thus, selecting a mortar pump system is not a trivial procedure, and there are no significative studies published in the specialized literature to fully understand the decision criteria applying to this equipment selection. Therefore, the present study aimed to identify the relevant criteria and quantify their importance in the selection of this equipment, by developing a framework combining both mortar pump specialists expertise and fuzzy analytic hierarchy process method to aid this decision making process. Results showed that acquisition cost and quality are the most relevant criteria, representing togheter around 2/3 of the decision weight, while technical and operational aspects account for aproximatelly 1/10 of relevance in the equipment selection.

Keywords:
mortar pump; decision making; Delphi; Fuzzy AHP; equipament selection.

Relative importance	Linguistic importance	Description
1	Equal importance	Both alternatives contribute equally to the objective.
3	Little or moderate importance of one over the other	Experience and judgment favor one alternative over the other.
5	Great or essential importance	Experience and judgment strongly favor one alternative over the other.
7	Very great or demonstrated importance	One alternative is very strongly favored over the other. Can be demonstrated in practice.
9	Absolute or extreme importance	The evidence favors one alternative over the other, with the highest degree of affirmation.
2,4,6,8	Intermediate values between the two adjacent judgments	When looking for a compromise condition between two definitions.
1/2,1/3,1/4,1/5, 1/6,1/7,1/8, 1/9	Values for reverse comparison	Adopted directly to the opposite alternative in the analysis.

	Price	Quality	Market reference	After sales	Performance	Ease of use
Price	(1,1,1)	$(5 \frac{1}{6}, 6, 6 \frac{7}{9})$	$(3 \frac{1}{5}, 4, 4 \frac{5}{8})$	$(2 \frac{6}{7}, 3 \frac{5}{9}, 4 \frac{1}{4})$	$(3, 3 \frac{1}{2}, 4)$	$(3 \frac{3}{7}, 4 \frac{1}{7}, 4 \frac{8}{9})$
Quality	$(\frac{1}{7}, \frac{1}{6}, \frac{1}{5})$	(1,1,1)	$(5 \frac{3}{4}, 6 \frac{2}{3}, 7 \frac{1}{2})$	(5,6,7)	$(3 \frac{6}{7}, 4 \frac{1}{2}, 5)$	$(3 \frac{1}{5}, 3 \frac{7}{8}, 4 \frac{4}{7})$
Market reference	$(\frac{2}{9}, \frac{1}{4}, \frac{1}{3})$	$(\frac{1}{8}, \frac{1}{7}, \frac{1}{6})$	(1,1,1)	$(5 \frac{1}{3}, 6 \frac{2}{9}, 7)$	$(3 \frac{4}{7}, 4 \frac{1}{4}, 5)$	$(2 \frac{8}{9}, 3 \frac{1}{2}, 4)$
After sales	$(\frac{1}{4}, \frac{2}{7}, \frac{1}{3})$	$(\frac{1}{7}, \frac{1}{6}, \frac{1}{5})$	$(\frac{1}{7}, \frac{1}{6}, \frac{1}{5})$	(1,1,1)	$(2 \frac{3}{7}, 3, 3 \frac{1}{2})$	$(3 \frac{2}{5}, 4, 4 \frac{4}{5})$
Performance	$(\frac{1}{4}, \frac{2}{7}, \frac{1}{3})$	$(\frac{1}{5}, \frac{2}{9}, \frac{1}{4})$	$(\frac{1}{5}, \frac{1}{4}, \frac{2}{7})$	$(\frac{2}{7}, \frac{1}{3}, \frac{2}{5})$	(1,1,1)	$(5 \frac{2}{9}, 5 \frac{4}{5}, 6 \frac{1}{3})$
Ease of use	$(\frac{1}{5}, \frac{1}{4}, \frac{2}{7})$	$(\frac{2}{9}, \frac{1}{4}, \frac{1}{3})$	$(\frac{1}{4}, \frac{2}{7}, \frac{1}{3})$	$(\frac{1}{5}, \frac{1}{4}, \frac{2}{7})$	$(\frac{1}{6}, \frac{1}{6}, \frac{1}{5})$	(1,1,1)

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E-mail: editor@rem.com.br

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alessandro.alves@ufabc.edu.br