Analysis of Functional Suitability and Usability in Sales Order Procedure to Determine Management Information System Quality

— In the development of information systems, it is very important to pay attention to the quality of the system which can be reviewed through aspects of usability for its users and following the needs and specifications of its users. This study will analyze the quality of the sales order management information system based on two characteristics of the ISO 25010 quality standard system, namely functional suitability and usability. The functional suitability test was carried out by the BlackBox testing method to test three sub-characteristics of functional suitability that are functional completeness, functional correctness, and functional appropriateness. Usability tests use a use questionnaire which is divided into four criteria that are usefulness, ease of use, ease of learning, and satisfaction. In testing the suitability of functionality involving 5 respondents and 17 respondents in usability testing. The results of this study indicate that the sales order management system fulfills two characteristics of information system quality that are functional suitability and usability. Where all the features designed are by the successful features, and the usability characteristics are 85.45% which indicates that the system is very feasible to implement


I. INTRODUCTION
Information systems are a series of components that can be in the form of people, procedures, data, and technology used to carry out a process in decision making to support the success of each organization in achieving each goal [1]. In developing information systems, quality is an important factor that must be considered. The quality of information systems is how a system can provide useful products and services for its users. The quality of information systems is a process by which the system is effectively implemented and able to meet the needs of its users [2]. The quality of the information system will depend on user satisfaction [3].
At PT. Bali Yoni Saguna is currently developing an information system to manage sales order procedures. A sales order is an internal procedure performed for the initialization of a project or sale. The information system being built is named BASSO (Baliyoni Saguna Sales Order). Where the information system will be used by several divisions such as the marketing division, sales admin, warehouse, and shipping division. The problem at this time is, it is not known whether the system being developed currently meets the standards and whether the system has been able to meet the needs of its users in functionality and whether the BASSO information system is feasible to implement. So, to be able to find out a quality information system and can meet the needs of its users, an evaluation is needed [4], because an information system must be able to display information appropriately to facilitate the work of its users or can assist in making a decision [5]. And to find out the suitability of the information system and its use in determining the quality of the system, it can be done by measuring the suitability of the features of the system and the extent to which a system can be used by its users, where when compared with the quality characteristics of the ISO 25010 standard system, these measurements are based on two characteristics, namely functional suitability and usability [6]. this division presents detailed quality models for computer systems and software products, quality in use, and data. ISO 25010 consists of eight sub characteristics, two of which are functional suitability and usability [10]. Functional suitability is one of the quality factor which measured by observing the correlation between function and functional suitability, the functional suitability checks if the product or system provides a function that meets all the stated or implicit needs when used under specific condition [11], and usability test is one way of ensuring that interactive systems are adapted to the users, their tasks and that there are no negative outcomes of their usage [12].
This study refers to previous studies on functional suitability and usability testing. First is functional suitability testing on the implementation of Balinese script learning based on augmented reality, this study measures functional suitability using the BlackBox testing method, wherein the black-box testing results test 8 functions and usability standards. reached 78.58% with good classification [13]. The next study is Functional Suitability Measurement using Goal-Oriented Approach based on ISO/IEC 25010 for Academics Information System. The result shows that the measurement using a goal-oriented approach becomes more objective and suitable to the need of used Academics Information System quality improvement for the institution than the measurement with ISO/IEC 25010 only [14]. The other study is, Usability Testing Using the Use Questionnaire in the Sipolin Application of West Java Province, This study focuses on how to test the user interface of SIPOLIN using Usability Testing with USE Questionnaire on SIPOLIN version 1.0. The result of this research shows all attributes have an average value above 3 that indicates SIPOLIN has a very good aspect of usability value [15]. Another related research is Analysis of the Quality of Information Systems for Monitoring Student Character Formation at Smk N 2 Depok Sleman, in this study analyzes the quality of the information system also measured from 2 characteristics namely functional suitability and usability. The results of this study are the information system has met ISO 25010 standards on functional suitability characteristics with a value of 1 (good), usability characteristics of 85.3% (very feasible) [3]. The other study is Analysis of the Quality of Information System for School Activities Based on Mobile Web in Public High School 2 Yogyakarta, where the goal of this study is to The purpose of this research is to guarantee the quality level of the School Activity Information System based on the mobile web so that errors do not occur as well as the features and functionality as promised by testing using the ISO 25010 standard. Where in this study 2 characteristics will be used, namely functional suitability and usability [16].
Based on the theory of several previous studies, this research will analyze the suitability of the sales order management information system functionality and the extent to which a system can be used by its users based on ISO 25010 characteristics, namely functional suitability and

II. RESEARCH METHOD
In this research, to determine the quality of the sales order management information system, it is analyzed based on 2 characteristics of the ISO 25010 information system quality. The research starts from literature study and observation, then continues with analysis and report writing.

A. Functional Suitability
The functional suitability test aims to determine whether the system is running according to the scenario and produces outputs that match the reaction of a particular action. Testing is done using the BlackBox method, where this test is to match that the functions designed for each system have been running according to their respective goals [17]. Testing with the BlackBox method refers to previous studies that have previously been carried out, testing is carried out based on the functions available on the system which are then carried out with the validation step of the results of the function [16], [17], [18], which is divided into three sub-characteristics of functional suitability when the sub-characteristics are functional completeness which consists of 17 functions, functional correctness which consists of 6 functions and functional appropriateness which consists of 2 functions. A brief description of the sub-characteristics of functional suitability based on ISO 25010 is:

Functional Completeness
The extent to which the function set includes all defined user tasks and objectives.
The extent to which the product or system provides correct results with the required level of precision.

Functional Apptopriateness
The extent to which the function facilitates the achievement of certain tasks and goals.
The assessment is based on the Guttman scale, which is a scale used for clear answers such as yes or no, true or false, positive-negative, agree and disagree [19]. The test results are then calculated using the feature completeness matrix [20] with the following equation 1. The characteristics of respondents used in functional suitability are respondents who are directly involved in system development and also as users who have an understanding of information technology. So that in this test 5 respondents were determined to represent each division that uses the sales order management information system and who are directly involved in system development. The respondents are supervisors from each division who will use information systems with an IT background and have experience in using information systems on average for the last 4 years at PT. Baliyoni Saguna. The login function as marketing is running correctly.

Add sales order data
The new add sales order function is running correctly 6 Update sales order data Sales order data update function is running correctly

Login as Sales Admin
The login function as a sales admin is running correctly 8 Change the status of the sales order to " delivery order" The function of changing the sales order status to "delivery order" is running correctly 9 Change sales order status to "ready to ship" The function of changing the sales order status to "ready to ship" is running correctly 10 Input the delivery order number The function of input the delivery order is running correctly  The process of filtering sales order data is based on the name of the marketing that created the sales order 6 Displays sales order data based on the status of the sales order Process sales order data filter based on the status of the sales order Usability is a factor that judges from the point of view of the ease with which software is used and studied [21]. Usability refers to the quality of the user's experience such as effectiveness, efficiency, and the overall satisfaction of the user when interacting with the systems [22]. Usability tests aim to determine the extent to which the system can be used by users to achieve goals effectively, efficiently, and with satisfaction in the user's context. Tests were carried out by using a questionnaire that was prepared based on usability criteria, namely,  Usability testing was carried out using a Likert scale [24] with 5 response points, 5 points for strongly agree, 4 points for agreeing, 3 points for neutral, 2 for points disagree, and 1 point for strongly disagree. Skor untuk usability dihitung dengan persamaan 2 dan 3 berikut.  Usability testing was carried out through a questionnaire prepared based on usability criteria with a total of 30 statements [23]. And respondents in usability testing are all users of the sales order management information system from the marketing, sales admin, warehouse, and shipping divisions so that the total number of respondents was 17 respondents.

A. Functional Suitability
The results of the functional suitability test using a questionnaire prepared based on system requirements and the BlackBox testing method and calculated using a functional matrix using equation 1 are described in the following explanation.

Functional Completeness
In the functional completeness test, 17 functions tested based on the Guttman scale with 5 respondents, shows that every function in the system already has the appropriate output when validation is carried out. The indicators of the tests carried out are shown in Table 6 which is the result of the recapitulation of one of the respondents who shows that the existing functions in the system are in accordance with the expected output. Then based on these results, a functional matrix calculation can be performed using equation 1 as follows.
The calculation of the functional matrix shows the value of X = 1, which means that the Functional Completeness indicator of all functions in the system has been running as expected. Or in other words the entire function runs by producing the appropriate output.

Functional Correctness
In testing functional correctness, 6 features were tested with the BlackBox testing method. Of the 5 respondents overall answered that all the features were running as expected. Table 7   This result also shows the value of X = 1, which means that the Functional Correctness of the validated indicators in the information system has succeeded in carrying out its functions accurately and in accordance with the purpose of the function.

Functional Appropriateness
Furthermore, functional appropriateness testing aims to see the extent to which the existing functions in the information system facilitate users in achieving certain tasks.
Where in this test there are 2 functions that are tested in accordance with Table 3. And the results of the recapitulation of test results from one of the respondents are shown in is as follows.
The overall results of testing on the functional suitability are shown in table 9 below. Table 9. FUNCTIONAL SUITABILITY TEST RESULTS

Sub-Characteristics of Functional Suitability X value
Functional Completeness 1

Rata-rata 1
From the results of the functional suitability test, it can be said that the sales order management system has met the functional quality standards, where all the functions designed are following the functions realized in the system, this is shown from the results of the functional matrix calculation, the average value of X = 1 [20].

B. Usability
The usability test was conducted using a Use Questionnaire with a total of 30 questions which were measured using a linkert scale. The number of respondents on usability was 17 respondents. Testing is based on usability criteria, namely usefulness, ease of use, ease of learning, and satisfaction. The results of usability testing can be seen in Figure 1 Below.  From the usability measurement data, it can be seen that the overall score obtained is 2179 from the maximum score of 2550. Then, when analyzed in more detail on each parameter measured in usability testing, it can be seen in the following graphic data.

Figure 2. USABILITY MEASUREMENT CHART
From the graphic data in Figure 2, it is known that the sales management information system is perceived to have good use or the system is perceived to be very useful in supporting the work of its users with a usability value of 85.29%. And the next parameter shows the information system has good ease of use, this is indicated by the measurement results on the ease of use parameter of 87.06%. Then the next parameter shows that the information system has ease in learning or in other words new users will easily understand the use of the information system, this is indicated by the ease of learning value of 83.53%. And users are satisfied with the existence of a sales management information system which is shown in the INTENSIF, Vol.5 No.2 August 2021 ISSN: 2580-409X (Print) / 2549-6824 (Online) DOI: https://doi.org/10.29407/intensif.v5i2.15537 satisfaction parameter to obtain results of 84.20%. Then for the overall score can be seen in Table 7 below.

Maximum Score
Total Test Score 2179 2550 100% 85.45% From the results obtained usability from the sales order management information system obtained 2179 scores from a maximum score of 2550. These results indicate that the interpretation of the sales order management system usability score is at a score of 85.45%.
Where when compared with table 5, the sales order management information system is at a very feasible level to be implemented.
Based on the results of testing two quality characteristics of information systems based on ISO 25010, namely functional suitability and usability, the results indicate that the sales order management information system implemented at PT. Bali Yoni Saguna has met these two quality standards.

IV. CONCLUSION
Based on the results of the research conducted, it can be concluded that the functional suitability and usability analysis to determine the quality of the sales order management system, can be concluded that the management system has met the quality standards of functional suitability and usability. Where functional suitability and usability are two characteristics of system quality from the ISO 25010 standard. This is shown from the results of the functional suitability where from each sub-characteristic the value of X = 1 is obtained, which indicates that the system runs according to the scenario and produces output following the reaction of action determined. And the results of the usability test show that the sales order management system is at a score of 85.45%, where the measurement results show that the system has excellent usability for users, is easy to operate, and the system is very easy to understand for new users, and users are satisfied with the sales order management system, so that the system is very feasible to implement. From the research results, it can also be concluded that the BASSO information system meets the Functional Suitability standard by meeting the standards for each indicator,