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All Journal Jurnal Rekavasi Jurnal Optimalisasi
Moh. Ainul Fais
Universitas W R Supratman Surabaya
Computer Science & IT Control & Systems Engineering Engineering Industrial & Manufacturing Engineering

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Smartphone Selection through AHP, Value Engineering, and Adapted QSPM Evaluation I Gusti Ayu Sri Deviyanti; Moh. Ainul Fais; Nyoman Sri Widari; Suhatati Tjandra
Jurnal Optimalisasi Vol 12, No 2 (2026): Oktober
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v12i2.16505

Abstract

Smartphone selection depends on criterion importance, perceived product attractiveness, monetary value, and ranking stability. This follow-up case study evaluates VIVO Y29 4G, POCO M6 PRO, and REDMI NOTE 14 4G using new paper questionnaires from 11 purposively selected assessors in Gresik, Indonesia, from 3 to 15 August 2026. We aggregated individual pairwise judgments geometrically for Analytic Hierarchy Process weighting, while averaging and rounding attractiveness ratings for an adapted quantitative strategic planning matrix. A post hoc value-engineering benchmark separated functional performance from monetary cost by using renormalized performance-camera weights and documented Indonesian suggested retail prices for standardized 8/256 GB variants. Camera received the highest AHP weight (0.574228), followed by performance (0.314461) and price (0.111312), with a group consistency ratio of 0.001290. Rounded QSPM scores ranked VIVO first (3.462916), REDMI second (3.111312), and POCO third (2.740233); normalized value indices were 0.642260, 0.610822, and 0.463032, respectively, preserving the same order. Retaining unrounded means reduced the VIVO–REDMI QSPM margin from 0.351604 to 0.257318, while all 12 one-at-a-time weight perturbations and all group-exclusion checks retained the ranking. The contribution is an explicit AHP-weighted operational adaptation of QSPM for product alternatives, not a new ranking algorithm; preference weighting, perceived attractiveness, function-to-cost value, and robustness are kept analytically separate, while the normalized value index (VI) remains a post hoc convergence benchmark rather than a reconstruction of survey-period market conditions.
MENINGKATKAN NILAI SISTEM PEMASARANUSAHA UMKM UD. XYZ MENGGUNAKAN METODE SERVQUAL: ANALISA KUALITAS LAYANAN DAN KEPUASAN PENGGAN Moh. Ainul Fais; Silvana Mohamad
Jurnal Rekavasi Vol 13 No 1 (2025)
Publisher : Prodi Teknik Industri, Universitas AKPRIND Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/rekavasi.v13i1.5192

Abstract

This study aims to analyze the service quality gap in the marketing system of UD. XYZ, a small footwear business, using the SERVQUAL method. The research focuses on five dimensions: tangibles, reliability, responsiveness, assurance, and empathy. Data were collected through questionnaires distributed to 70 customers, measuring their expectations and perceptions of service quality. The results reveal critical gaps, with responsiveness (-1.25) and empathy (-1.00) as the most significant issues, indicating slow response times and a lack of personalized attention. These gaps negatively impact reliability (-0.60) and assurance (-0.45), highlighting systemic product consistency and trust challenges. Valid and reliable instruments (Cronbach’s Alpha > 0.7 for all dimensions) confirm the findings. To address these gaps and boost customer satisfaction, the study recommends integrated solutions, including improved customer service protocols, loyalty programs, and quality control enhancements. This research contributes to the literature on SERVQUAL applications in small-scale footwear businesses and provides actionable insights for UD. XYZ and similar SMEs to refine their marketing strategies.
Co-Authors I Gusti Ayu Sri Deviyanti Nyoman Sri Widari Silvana Mohamad Suhatati Tjandra