Judul: Kepuasan Konsumen Cloud Kitchen Ayam Serundeng Wak Haji di Bandar Lampung
Abstrak: Cloud kitchen merupakan model usaha jasa makanan yang tidak melayani pesanan makan di tempat dan hanya berfokus untuk melayani konsumen secara pelayanan pesan antar. Ayam Serundeng Wak Haji merupakan salah satu usaha kuliner di Bandar Lampung yang berdiri tahun 2022 dengan konsep cloud kitchen. Rata-rata penjualan produk yang belum mencapai target serta terdapat komentar kurang baik dari konsumen sehingga diperlukan analisis kepuasan konsumen. Penelitian ini bertujuan untuk mendeskripsikan proses keputusan pembelian konsumen, menganalisis tingkat kepuasan konsumen, dan menganalisis atribut yang perlu diperbaiki. Data dianalisis menggunakan analisis deskriptif, Customer Satisfaction Index (CSI), dan Importance Performance Analysis (IPA). Hasil dari penelitian ini adalah sebagian besar responden adalah perempuan muda berstatus mahasiswa atau pelajar dan memiliki keputusan pembelian otonom. Berdasarkan analisis CSI, nilai yang didapat sebesar 83,38 persen dan berada pada kategori “sangat puas”. Berdasarkan hasil IPA, atribut ketersediaan menu dan kelengkapan deskripsi menu di marketplace menjadi prioritas dalam perbaikan kinerja untuk meningkatkan kepuasan konsumen., Cloud kitchen is a food service business system that does not serve dine-in orders and only focuses on serving delivery. Ayam Serundeng Wak Haji is one of the culinary business in Bandar Lampung which was established in 2022 with the concept of cloud kitchen. The average sales of products that have not reached the target, coupled with negative feedback from customers, necessitate a customer satisfaction analysis. This study aims to describe the consumer purchase decision process, analyze the level of consumer satisfaction, and analyze the attributes that need to be improved. Data were analyzed using descriptive analysis, Customer Satisfaction Index (CSI), and Importance Performance Analysis (IPA). The results of this study are that most of the respondents are young women with student status and have autonomous purchasing decisions. Based on the CSI analysis, the CSI of this restaurant is 83,38 percent which is equal to "very satisfied" category. Based on the IPA results, the attributes of menu availability and completeness of menu descriptions in the marketplace are priority in improving performance to increase consumer satisfaction.
Keyword: CSI, IPA, Kepuasan Konsumen, Keputusan Pembelian

Judul: Analisis Proses Pengambilan Keputusan Pembelian dan Kepuasan Konsumen RM. Sop Ayam Pak Min Klaten Cabang Bogor
Abstrak: RM. Sop Ayam Pak Min Klaten Cabang Bogor is one of restaurant which offers traditional Javanese cuisine, especially chicken soup. The objectives of this study are to identify the characteristics of consumer, to analyze the decision buying process, to analyze the customer satisfaction level based on performance attributes of the restaurant, and to formulate alternatives marketing strategy. Data were collected by questionnaire survey to 100 respondents who were selected by convenience sampling. Descriptive analysis, Importance Performance Analysis (IPA), Customer Satisfaction Index (CSI), and gap analysis were employed in this research. The result of IPA showed some attributes to be improved, i.e. cleanness of the food and food equipment, cleanness of the restaurant, availability and cleanness of toilet and sink, availability of parking lot, and the comfort of restaurant. The result of CSI analysis showed that the level of consumer satisfaction was 75.27 percent, meaning that the consumers of RM. Sop Ayam Pak Min Klaten Cabang Bogor were satisfied.
Keyword: marketing strategy, gap analysis, IPA, CSI, characteristics of consumer

Judul: Invers Drazin dari Matriks Toeplitz Singular
Abstrak: Matriks Toeplitz adalah matriks yang setiap unsur pada diagonal utama bernilai sama dan setiap unsur pada subdiagonal yang bersesuaian dengan diagonal utama juga bernilai sama. Matriks singular adalah matriks yang tidak bisa ditentukan inversnya. Akan tetapi, dapat diupayakan untuk ditentukan inversnya menggunakan invers matriks yang diperumum. Invers Drazin merupakan salah satu jenis invers matriks yang diperumum. Pada karya ilmiah ini ditentukan invers Drazin dari matriks Toeplitz singular dengan menggunakan metode Leverrier Faddeev. Kemudian, ditentukan invers Drazin dari matriks Toeplitz singular yang direpresentasikan sebagai penjumlahan segitiga bawah dan segitiga atas matriks Toeplitz berdasar pada teorema Gohberg dan Semencul., Toeplitz matrix is a matrix in with element on the main diagonal has the same value and on the subdiagonal corresponding to the main diagonal also has the same value. Singular matrix is a matrix that has no inverse. However, it can be attempted to determine the inverse using a generalized inverse matrix. Inverse Drazin is a type of generalized matrix inverse. This paper discussed the inverse Drazin for a singular Toeplitz matrix using the Leverrier Faddeev method. Then, the Drazin inverse of the singular Toeplitz matrix which is represented as a sum of products of lower and upper triangular Toeplitz matrix based on Gohberg and Semencul theorem.
Keyword: inverse Drazine, singular Toeplitz matrix