Available online at: ...repository.unpkediri.ac.id/2699/2/57201_0721029101.pdf · rekayasa / keteknikan. Berbagai topik dalam ilmu rekayasa / keteknikan dapat diterima di jurnal ini,

Performansi Kolektor Surya Pada Mesin Pendingin Yang Menggunakan Pasangan Adsorpsi Karbon Aktif Serbuk-Metanol

Study of the Effect of Bulb Ratio and Blade Angle on Propeller Turbine Performance in Horizontal Flow using Numerical Simulation

Sealing Performance Layered Metal Gasket Based on the Simulation Method

Studi Korosi Baja Galvanis Melalui Perlakuan Ekspos Di Lingkungan Perairan Sungai Cidaho - Sukabumi

Peningkatan Kekuatan Sifat Mekanis Komposit Serat Alam menggunakan Serat Enceng Gondok (Tinjauan Pustaka)

Pemodelan Pupuk Rilis Lambat Dengan Fly Ash sebagai Matriks Inert yang Dilapisi oleh Ethylcellulose

Efisiensi Energi dan Reduksi Harga Total Produksi Hidrogen pada Siklus Sulfur-Iodine Seksi III Skala Pilot Menggunakan Analisis Pinch

Analisis Pengaturan Parameter Sinusoidal Pulse Width Modulation pada High Precission Closed Loop Full Bridge Bipolar Inverter untuk Pembangkit Tegangan Tinggi Berfrekuensi Tinggi

Analisis Quality of Service Jaringan Long Term Evolution pada Mode Frequency Division Duplexing di Kota Semarang

Improving The Performance of Alumni Achievement Assessment by Integrating Website-Based Tracer Study Information Systems and Telegram API

Faktor – Faktor yang Mempengaruhi Perkembangan Usaha Industri Konveksi Berbasis Rumah di Kelurahan Tingkir Lor

Redesain Awana Condotel Menggunakan Metode Flat Slab Berdasarkan SNI 2847-2013

Mei 2020 Vol. 41 No. 1

Halaman 1-99

Available online at: http://ejournal.undip.ac.id/index.php/teknik

Tersedia online di: http://ejournal.undip.ac.id/index.php/teknik

Teknik, 41 (1), 2020, i

Copyright © 2020, TEKNIK, p-ISSN 0852-1697, e-ISSN: 2460-9919

Teknik Sipil Teknik Industri

Teknik Arsitektur Teknik Lingkungan

Teknik Kimia Teknik Perkapalan

Teknik Mesin Teknik Geologi

Teknik Elektro Teknik Geodesi

Teknik Perencanaan Wilayah dan Kota Teknik Sistem Komputer

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TEKNIK (ISSN 0852-1697; http://ejournal.undip.ac.id/index.php/teknik) adalah peer-reviewed journal

yang sudah terindeks di beberapa pengindeks bereputasi, antara lain: Google Scholar; Directory of Open

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Technology Index.



Teknik, 41 (1), 2020, ii

TIM EDITOR

Ketua Penyunting (Editor in Chief):

Dr. Eng. Wahyul Amien Syafei, S.T., M.T. (Teknik Elektro, Universitas Diponegoro)

Dewan Penyunting (Editorial Board):

Prof. Dr. Istadi, S.T., M.T. (TTenik Kimia, Universitas Diponegoro)

Prof. Dr. Ir. A. P. Bayuseno, M.Sc. (Teknik Mesin, Universitas Diponegoro)

Prof. Dr. Ir. Sri Prabandiyani, M.Sc. (Teknik Sipil, Universitas Diponegoro)

Dr. Ir. Maria Wahyuni, M.T. (Teknik Sipil, Universitas Katholik Soegijapranata)

Dr. Ir. Atik Suprapti, M.T. (Teknik Arsitektur, Universitas Diponegoro)

Mitra Bebestari (Peer-Reviewers):

Prof. Dr. Istadi, S.T., M.T. (Teknik Kimia, Universitas Diponegoro)

Prof. Dr. Moh. Djaeni, S.T., M.Eng. (Teknik Kimia, Universitas Diponegoro)

Muhammad Zubair Muis Alie, S.T., M.T., Ph.D-Eng. (Teknik Kelautan, Universitas Hasanuddin)

Nanang Masruchin, S.T., M.T., Ph.D. (Lembaga Ilmu Pengetahuan Indonesia)

Dr. Eng. Gunawan Dwi Haryadi, S.T., M.T. (Teknik Mesin, Universitas Diponegoro)

Dr. Sulardjaka, S.T., M.T. (Teknik Mesin, Universitas Diponegoro)

Dr. Wahyul Amien Syafei, S.T., M.T. (Teknik Elektro, Universitas Diponegoro)

Aghus Sofwan, S.T., M.T., Ph.D. (Teknik Elektro, Universitas Diponegoro)

Mochammad Facta, S.T., M.T., Ph.D (Teknik Elektro, Universitas Diponegoro)

Dr. Yulita Arni Priastiwi, S.T., M.T. (Teknik Sipil,Universitas Diponegoro)

Dr. Yasser Wahyuddin, S.T., M.T., M.Sc. (Teknik Sipil,Universitas Diponegoro)

Eko Handoyo, S.T., M.T. (Teknik Elektro, Universitas Diponegoro)

Dr. Ing. Prihadi Nugroho, S.T., M.T. (Teknik Perencanaan Wilayah dan Kota, Universitas Diponegoro)

Diah Intan Kusumo Dewi, S.T., M.Eng. (Teknik PWK, Universitas Diponegoro)

Staf Editorial Office:

Dr. Yasser Wahyuddin, S.T., M.T., M.Sc. Ari Eko Widyantoro, S.T., M.Si

Lis Setyowati, S.Sos., M.A. Indah Wulani, A.Md Ramaji Mardian, S.IP

Penerbit: Fakultas Teknik, Universitas Diponegoro

Sekretariat: Dekanat Fakultas Teknik, Universitas Diponegoro, Jl. Prof. H. Soedarto, Kampus Undip

Tembalang, Semarang, Tel. (024) 7460053

Website: http://ejournal.undip.ac.id/index.php/teknik; E-mail: [email protected]



Teknik, 41 (1), 2020, iii

KATA PENGANTAR

TEKNIK (p-ISSN 0852-1697, e-ISSN: 2460-9919) adalah jurnal ilmiah terakreditasi Nasional Ristekdikti (S2), yang

diterbitkan oleh Fakultas Teknik Universitas Diponegoro. Volume 41 Nomor 1 Tahun 2020 (Mei 2020) merupakan

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Fulltext dan Open Access dalam format PDF secara online di http://ejournal.undip.ac.id/index.php/teknik. Mulai tahun

2014, hanya artikel-artikel yang berasal dari hasil-hasil penelitian saja yang dapat dimuat di jurnal Teknik setelah ditelaah

para mitra bebestari.

Artikel-artikel yang termuat dalam Jurnal TEKNIK ini adalah artikel-artikel yang sudah melalui proses penilaian

atau review oleh Mitra Bebestari dan/atau Dewan Penyunting. Penulis harus memperhatikan kualitas isi artikel sesuai

petunjuk penulisan artikel dan komentar dari Mitra Bebestari yang ditampilkan di masing-masing penerbitan atau dapat

didownload di website jurnal tersebut. Jumlah artikel yang terbit pada nomor ini sebanyak 12 judul, meliputi bidang-

bidang teknik mesin, metalurgi, kimia, komputer, energy listrik, perencanaan wilayah dan kota, dan sipil. Jurnal

TEKNIK nomor ini menyajikan karya penulis dengan beragam afiliasi, tidak hanya dari dalam, namun juga dari luar

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Diponegoro sendiri, Pusat Penelitian Metalurgi dan Material – Lembaga Ilmu Pengetahuan Indonesia, Pusat Penelitian

dan Pengembangan Jalan dan Jembatan - Kementerian Pekerjaan Umum dan Perumahan Rakyat; Universitas Sumatera

Utara, Universitas Sebelas Maret, University of Udayana, Universitas Teknologi Yogyakarta, Universitas Nusantara

PGRI Kediri, dan Universitas Islam Balitar.

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cukup penting dalam perkembangan ilmu-ilmu keteknikan. Penghargaan dan terima kasih yang sebesar-besarnya

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jurnal ini.

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Nomor 2 Tahun 2020 (Agustus 2020) setelah melalui proses telaah oleh Dewan Penyunting dan/atau Mitra Bestari.

Mulai Volume 35 Tahun 2014, jurnal Teknik tampil dengan gaya selingkung yang baru dan format artikel yang baru

menuju yang lebih baik, serta dilengkapi dengan Digital Object Identifier (DOI). Petunjuk penulisan lengkap untuk

tahun 2020 ditampilkan di portal jurnal ini.

Salam,

Ketua Penyunting

http://ejournal.undip.ac.id/index.php/teknik



Teknik, 41 (1), 2020, iv

DAFTAR ISI

Fokus, Ruang Lingkup dan Informasi Indeksasi Jurnal i

Tim Editor ii

Kata Pengantar iii

Daftar Isi iv

Performansi Kolektor Surya Pada Mesin Pendingin Yang Menggunakan Pasangan Adsorpsi Karbon Aktif

Serbuk-Metanol

Tulus Burhanuddin Sitorus, Syahrul Abda

Departemen Teknik Mesin Fakultas Teknik , Universitas Sumatera Utara; PUI Energi Berkelanjutan dan

Biomaterial, Universitas Sumatera Utara

1 - 8

Study of the Effect of Bulb Ratio and Blade Angle on Propeller Turbine Performance in Horizontal

Flow using Numerical Simulation

Akhmad Nurdin, Dwi Aries Himawanto, Syamsul Hadi

Departemen Teknik Mesin Fakultas Teknik, Universitas Sebelas Maret

9 - 13

Sealing Performance Layered Metal Gasket Based on the Simulation Method

I Made Gatot Karohika, Shigeyuki Haruyama, I Nyoman Gde Antara, I Nyoman Budiarsa, I Made Dwi

Budiana Penindra

Department of Mechanical Engineering, University of Udayana; Graduate School of Innovation and

Technology Management, Yamaguchi University

14 - 19

Studi Korosi Baja Galvanis Melalui Perlakuan Ekspos Di Lingkungan Perairan Sungai Cidaho - Sukabumi

Ahmad Royani, Gadang Priyotomo, Hadi Gunawan, Joko Triwardono, Lutviasari Nuraini, Siska

Prifiharni, Heri Nugraha, Sugiarti, Sundjono

Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia; Pusat Penelitian dan

Pengembangan Jalan dan Jembatan, Kementerian Pekerjaan Umum dan Perumahan Rakyat

20 - 26

Peningkatan Kekuatan Sifat Mekanis Komposit Serat Alam menggunakan Serat Enceng Gondok (Tinjauan

Pustaka)

Sulardjaka, Sri Nugroho, Rifky Ismail

Departemen Teknik Mesin Fakultas Teknik, Universitas Diponegoro

27 - 39

Pemodelan Pupuk Rilis Lambat Dengan Fly Ash sebagai Matriks Inert yang Dilapisi oleh Ethylcellulose

Kemal Maulana, Mohamad Djaeni

Departemen Teknik Kimia Fakultas Teknik, Universitas Diponegoro

40 - 47

Efisiensi Energi dan Reduksi Harga Total Produksi Hidrogen pada Siklus Sulfur-Iodine Seksi III Skala Pilot

Menggunakan Analisis Pinch

Sonya Hakim Raharjo, Ima Winaningsih, Widayat Widayat

Magister Teknik Kimia Fakultas Teknik, Universitas Diponegoro; Departemen Teknik Kimia Fakultas

Teknik,Universitas Diponegoro

48 - 54

Analisis Pengaturan Parameter Sinusoidal Pulse Width Modulation pada High Precission Closed Loop Full

Bridge Bipolar Inverter untuk Pembangkit Tegangan Tinggi Berfrekuensi Tinggi

Abdul Syakur, Arifin Wibisono

Departemen Teknik Elektro Fakultas Teknik, Universitas Diponegoro

55 - 61

Analisis Quality of Service Jaringan Long Term Evolution pada Mode Frequency Division Duplexing di Kota

Semarang

Annisa Rossy Rahmatika, Sukiswo Sukiswo, Eko Didik Widianto

Departemen Teknik Komputer Fakultas Teknik, Universitas Diponegoro; Departemen Teknik Elektro

Fakultas Teknik Universitas Diponegoro

62 - 71

Improving The Performance of Alumni Achievement Assessment by Integrating Website-Based Tracer Study

Information Systems and Telegram API

Sucipto, Ervin Kusuma Dewi, Nalsa Cintya Resti, Indyah Hartami Santi

Universitas Nusantara PGRI Kediri; National Taiwan University of Science and Technology;

Universitas Islam Balitar

72 - 77



Teknik, 41 (1), 2020, v

Faktor – Faktor yang Mempengaruhi Perkembangan Usaha Industri Konveksi Berbasis Rumah di Kelurahan

Tingkir Lor

Debora Decynthia Saragih, Wido Prananing Tyas

Departemen Perencanaan Wilayah dan Kota Fakultas Teknik, Universitas Diponegoro

78 - 91

Redesain Awana Condotel Menggunakan Metode Flat Slab Berdasarkan SNI 2847-2013

Samsul Hasibuan, Dwi Kurniati

Program Studi Teknik Sipil Fakultas Sains dan Teknologi, Universitas Teknologi Yogyakarta

92 - 99

Petunjuk Penulisan 2020 (Author Guidelines 2020) App.1-5

Erratum App.6


TEKNIK, 41 (1), 2020, 72-77

doi: 10.14710/teknik.v41n1.25307 Copyright © 2020, TEKNIK, p-ISSN: 0852-1697, e-ISSN: 240-9919

Improving The Performance of Alumni Achievement Assessment

by Integrating Website-Based Tracer Study Information Systems

and Telegram API

Sucipto1*

, Ervin Kusuma Dewi 2, Nalsa Cintya Resti

1, Indyah Hartami Santi

3

1

Universitas Nusantara PGRI Kediri

Jl. KH. Ahmad Dahlan No.76, Mojoroto, Kec. Mojoroto, Kota Kediri, Indonesia 64112 2 National Taiwan University of Science and Technology,

No. 43號, Section 4, Keelung Rd, Da’an District, Taipei City, Taiwan 106 3Universitas Islam Balitar,

Jl. Majapahit No.2- 4, Sananwetan, Kec. Sananwetan, Kota Blitar, Indonesia 66137

Abstract

It is the mission of Vocational High School (SMK) education in Indonesia to produce highly competitive

and skilled graduates. One standard for evaluating the success of vocational education is assessing the

achievements of alumni. The evaluation process can be carried out with programmed alumni tracking

activities or commonly known as tracer studies. However, the implementations of tracer studies that have

been carried out by vocational schools in Kediri are still using the manual method. These conditions make

the school find many obstacles in the implementation of tracer studies. Some schools have used

technology with e-mail applications but have financial constraints. This research aims to improve the

performance of assessing the alumni achievement of Vocational Schools in Kediri by integrating the

website-based tracer study information system with social media Telegram API. Usability testing that

gave 4.83 of 5 scales has shown that the integration can improve the performance and benefits of an

application compared to the application before integration.

Keywords: tracer study; API; social messaging; Telegram; web-based

1. Introduction

The high growth of vocational high school

(SMK) in Indonesia, particularly in the area of

Education Office of Kediri Regency, is signified by the

proliferation of the opening of the SMK and the

increased interest of young people continue their

education in the field. The success of its

implementation is inseparable from the assessment

system conducted by the government (Fitri, 2018). One

standard for evaluating the success of vocational

education is assessing the achievements of the alumni.

The evaluation includes the relevance to the

working world, the number of graduates absorbed, and

graduates' competency suitability with the labour

market’s needs. The evaluation process can be carried

out with programmed alumni tracking activities,

commonly known as tracer studies (Sa’idah,

Andriyani, & Saefudin, 2017). However, the Kediri

vocational school tracer studies still use manual

methods. Therefore many obstacles faced. Paper-

based alumni data collection is inefficient as the

paper gets easily damaged and dirty, while it is also

challenging to reach graduates who are outside the

city. Those who used e-mail face financial

constraints. The telephone is also ineffective because

not all alumni are willing and have time to be

interviewed directly. School also sent questionnaires

by mails, but not all graduates gave feedback

(Wicaksono, Hartanto, & Azhar, 2017). Tracer study

is expected to be the best way to gather alumni

feedback to support the evaluation process.

Based on those facts and given the rapid

technological developments, a system can be designed

to get alumni data by combining website technology

with the social media API, namely Telegram (Sajad,

Hossein Heidari, & Azizeh, 2019). Using website to

collect alumni data, one will gain the benefits of easier

access to the website; easier access to the data, more

efficient and effective process, inexpensive cost, and

easier data management (Astini, Agustini, &

Santyadiputra, 2016; Nugroho & Nugroho, 2018).

Moreover, the Telegram API feature serves as a

reminder through a mobile chat application when

alumni have not yet sent a tracer study report.

TEKNIK, 41 (1), 2020, 73


Research on tracer study was conducted by Diana

and As'ad in 2017, entitled "Web-Based Information

Systems and Analysis of the Relevance of Tracer

Studies at University of Prof. Dr. Hazairin, SH

Bengkulu." The research discussed the process of

gathering information on the performance of graduates

using website media. They concluded that the relevance

of the graduates' education to the work that they are

currently engaged in as consideration for improving the

education and teaching system (Diana & As’ad, 2017).

Another research was carried out by Nugroho and

Nugroho in 2018 entitled "Career Center System and

Higher Education Tracer Study." The research discussed

the design of systems and career center and tracer

studies in tertiary institutions using the System

Development Life Cycle (SDLC) to determine the

absorption and position of graduates in the industry,

compile learning process strategies, and improve the

quality of graduates. The results of the study showed the

needs of the career center and tracer study system. They

were also able to optimize the function of alumni data

services for tertiary institutions (Nugroho & Nugroho,

2018).

A research conducted by Wicaksono, Hartanto,

and Azhar in 2018 entitled "Alumni Career Information

System and Tracer Study Case Studies in Informatics

Engineering Study Program, University of

Muhammadiyah Malang." The study discussed the

design of tracers that engage users through Facebook.

However, the system tools used were Google Form;

therefore, the system has not been structured and

unsystematic. The study results showed that the system

accommodated the needs of filling and making alumni

search results (Wicaksono et al., 2017).

Based on the previous research discussed, one can

conclude that the researches were carried out to serve the

need for information technology, particularly for website

based-services. A common problem found in the studies

was that they applied manual systems, and information

were not well distributed. A different approach to the study

needs to be done, by designing a system with Telegram

API feature. The system is online, making it easier to

distribute information. Notification can be delivered to

alumni through Telegram application messages.

Based on the description above, the tracer study

information system will be implemented at the vocational

school in Kediri. The results are expected to help schools

independently track alumni with website media and social

media chat using the telegram API.

2. Research Method

This research was conducted to create an system.

A system is a group of elements that are strictly

interconnected and work together to achieve specific

goals. Besides, information is generally defined as the

result of processing data into a more useful form. Thus,

it can be concluded that the information system is a

system that provides information to all parties of an

organization (Hartono, 2007).

The system was designed for tracer study. Tracer

study is a study of graduates from an education unit to

dig up information through filling out questionnaires

arranged in such a way as to improve curriculum and

educational processes in a school (Schomburg, 2003).

This system also use Telegram as an important feature.

Telegram is a messaging software program that

focuses on speed and security. Telegram can send text

messages, pictures, videos, files (doc, zip, mp3).

Sketchily, Telegram is described as a combination of

SMS and E-mail. One of the unique features that

Telegram has is that users can create APIs through bots.

This Telegram bot can act like a human telegram

account to send and receive messages. A telegram bot

can be created by registering it with @botfather on the

Telegram (Telegram, 2019a, 2019b).

Figure 1. Metode Bot API Telegram

There are two of the most popular bot

management methods, as shown in Fig. 1 long-polling

and webhooks. The bot management function is to share

data efficiently between applications and application

users. Both ways have advantages and disadvantages.

Long-Polling is the default method of Portable

Telegram, which means that the process can be run on

various devices, including computers, cellphones, IoT

devices, and routers. This method does not require using

an online server. The disadvantages of this method

include that the process of reading a chat is quite long.

The update process is not realtime. Webhook has the

advantage of reading conversations faster than long-

polling. This method can be run for 24 hours because it

TEKNIK, 41 (1), 2020, 74


runs on an online server that has an SSL certificate. This

method can update the script in realtime (Hasan, 2016).

The research used the Linear Sequential Model

method. This method demonstrates a systematic and

sequential approach to software development that starts at

the system level and develops through analysis, design,

coding, and testing (Dharmawan, Sucipto, & Indriati,

2019). Fig.2 illustrates a linear sequential model for

software engineering. System/information engineering and

modeling become part of the business system. The steps

began by setting requirements for all system elements and

then allocating some of these requirements to the software.

Software systems must interact with other elements, such

as hardware, people and databases. Systems engineering

and analysis includes gathering requirements at the system

level with a small number of top-level design and analysis.

Information techniques include gathering requirements at

the strategic business level and the business area level

(Pressman, 2010).

On the analysis stage, the process done was

gathering requirements intensified and explicitly focused

on the software. As for the design stage, the activity

conducted was designing software with diagrams. On the

coding stage, activities at this stage was creating code. The

last stage, testing, focused on the logical internal of the

software, ensuring that all statements have been tested and

on the functional external.

3. Result and Discussion

This research was conducted following the Linear

Sequential Model. This method uses a systematic and

sequential approach to software development that starts at the

system level and develops through analysis, design, coding,

and testing. This research model is illustrated in Fig. 2.

The steps taken are tracer study system analysis.

Researchers have collected data on several stakeholders,

including sampling to Vocational Schools, ICT Subject

Teacher Representatives and MGMP Guidance Counseling

(BK) representatives. The next stage is to make an

application design information system based on data that

has been obtained. The design stage consists of two steps,

namely diagram design that will use Data Flow Diagrams

(DFD) and interface design for information system

interfaces.

The level 0 diagram design scheme in Fig. 3 shows

the basic system flow of the tracer study information

system products. Entities in the information system consist

of 3, including alumni, admin appointed by the school to

monitor and manage system reports and bot tracer study

which is a robot as a guide to serving every alumni

question. In Fig. 3, there are several business processes on

each entity. Alumni entities can register independently, log

into the system, find out various information such as about

job vacancies, fill out alumni tracking forms and alumni

will get notifications from bot tracer study.

The admin entity has several business processes

including mass registration of alumni, logging into the

system, providing information to alumni, viewing alumni

data statistics, viewing alumni data, exporting alumni data

and logging system control. Telegram bot entities serve as

servants for alumni. One of the tasks performed by the bot

is for the registration section and to provide various

notifications to alumni and admins. Bot ease the burden of

admin to serve a wide range of questions put by the alumni.

Fig. 4 is a database relation design in information

systems — database design by DFD derivatives. There are

six tables connected except the siswa_temp table. The

siswa_temp table is used for temporary shelters for alumni

import data

The database table design in Fig. 4 consists of two

different engines (S. Sucipto, Resti, Andriyanto, Karaman,

& Qamaria, 2019; Sucipto Sucipto, 2017). The machines

used are InnoDB and MyISAM. Only the siswa_temp table

uses the MyISAM engine. The siswa_temp table functions

as a temporary student table when uploading data to a web-

based system. In addition to siswa_temp tables, all other

tables use the InnoDB engine which is used as a database

relation on the MariaDB database. The use of the MyISAM

type engine can optimise databases with non-relational

models (Abadi et al., 2018; Rijati et al., 2015; Sucipto,

Indriati, & Hariawaan, 2017). Using the MyISAM

Enginedcan determine DML priorities with commands

LOW_PRIORITY, DELAYED, and HIGH_PRIORITY

(Dyer, 2015).

Figure 2. Linear Sequential Model

Figure 3. Level 0 DFD

TEKNIK, 41 (1), 2020, 75


The stage of the tracer study information system

design uses the bootstrap framework with the adminLTE

template. AdminLTE interface, as shown in Fig. 5.

AdminLTE is an opensource admin dashboard intended

for information system panels. AdminLTE is built using

the Bootstrap framework. AdminLTE provides various

components that are responsive, reusable, and

commonly used.

The code phase uses sublime text version 3 tools.

Sublime Text is an advanced text editor for code,

markup, and prose. This tool can be used in a variety of

code languages, including those used in making tracer

study information systems, namely the PHP and SQL

programming languages. The code structure in the tracer

study information system consists of various modules

that are interrelated. Modules enter the program

directory. Display in the program directory is shown in

Fig. 5. The module consists of CSS modules, namely

jQuery, bootstrap, awesome and ionic fonts. Program

modules include PDF, excel and server-side data table

modules.

The interfaces in the tracer study information

system are divided into two entities: admin and alumni.

Some access rights are following the diagram design in

Fig. 6. The design is then combined with the PHP and

SQL coding process.

There are five admin modules, including: (1) a

news module; (2) a control module; (3) an export

module; (4) a message module; and (5) a student

module. The news module manages information such as

job vacancies, whereas the control module manages

alumni login management. The export module aims to

export alumni data such as alumni tracking data, while

the message module sends messages to alumni. The

student module manages alumni identity data, including

the import of alumni registration, who do not register

through the standalone system. One of the telegram API

notification features is notification via Telegram to the

school manager when the alumni fill in the data. The

notification result is shown in Fig. 7.

The alumni module consists of 4 modules,

namely: (1) the alumni module located in the alumni

directory and alumni2 which functions as an alumni

search form module; (2) the results module to display

the history of filling alumni searches; (3) the password

module to change alumni password data; and (4) the

message module to send messages to the admin.

Figure 4. Tracer Study Database

Figure 5. Interface AdminLTE

Figure 6. Tracer Study System Page

Figure 7. Bot Telegram Notification

TEKNIK, 41 (1), 2020, 76


The results obtained after the prototype

functionality testing showed that all functions went well

because the prototype met the functional and user

requirements. System testing uses the usability method

to determine the level of effectiveness, efficiency, and

satisfaction. The results of the usability testing were

shown in Figure 8.

Figure 8. Application Testing

Figure 8 is the result of usability testing.

Assessments were based on effectiveness, efficiency,

and satisfaction (Sucipto, Hariawan, Nurita, &

Tammam, 2018). The test was carried out based on eight

trials. The results show an improvement in the quality of

the application, which is seen based on the 1st-to-8th

trials chart.

The results of Figure 8 show an increase in the

quality of application testing. The increasing value

shown in Figure 8 was obtained after prototype

improvement, making it easier for respondents when re-

using the application. Test results indicate that usability

tests can improve the performance and benefits of an

application.

4. Conclusion

Integration of the website-based tracer study

information system with social media API Telegram has

been done. Usability testing that gave 4.83 of 5 scales

has shown that the integration can improve the

performance of assessing the alumni achievement of

Vocational Schools in Kediri. It also can improve the

benefits of the application compared to the application

before integration.

Acknowledgment

The author would like to thank the Directorate of

Research and Community Service (DRPM) of the

Indonesian Ministry of Research and Technology who

has provided financial support for this research through

a beginner lecturer research scheme (PDP).

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