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One of the Atlassisan's main products, JIRA is good tool for Developer, however, the views for Manager, has been said "weak". 

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As a means of supporting features that the products do not own, Atlassian provides Site for Developers and SDK, and Atlassian Marketplace as a place to release developed software. 

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Often, JIRA is used in product-developing project, however, there has been strong demand for the gantt-chart features that managers utilize. Then we enabled the gantt-chart add-on (originally developed by a German engineer) which was at that time provided for free, for the Japanese with Japanese resource.  However, we were in the situation that we had to provide some donation to the engineer since he was Christian otherwise we would've been able to utilize the add-on. So we started thinking about developing our own add-on some day because there were lots of requests for the gannt-chart feature from our customers. 

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Since JIRA is using jQuery, we thought of leveraging the library of drawings made for gantt-chart. However, there were nothing reliable so we investigated more in a wider area and decided to select a drawing library that was the best among all JavaScript library. Ext Gantt was the one we chose. Ex Gantt is based on ExtJS and we felt comfortable in using Ex Gantt since we had been using it for more than a year. 

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< Implementing >

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On the day before the demonstration of Gantt Chart, we found a bug. It was actually a bug from ExtJS, however, we did not know what the cause was. So we sent the code to the technical support desk of Bryntum and they investigated for only 30 minutes then discovered the cause. (The support desk responded exceptionally fast after we told them it would be needed on the next day.) Then, within another 30 minutes, they sent us the fixed code (of ExtJS code) and it ran correctly that made our demonstration possible. 

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< Result >

We registered this product in Atlassian Marketplace as "WBS Gantt-Chart for JIRA". And now WBS Gantt-Chart for JIRA does agile development, has been through version upgrades, and become a product that is always displayed in the top selling add-ons for JIRA.  

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Our WBS Gantt-Chart for JIRA is now used in large IT and manufacturing companies, and in not only Japanese but also Overseas big IT, software development companies, and in Universities. Last year, we signed sponsorship for the first time for a Japanese company, in Atlassian Summit 2015, and manned a booth to promote WBS Gantt-Chart for JIRA. 

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At the booth, we received a lot of feedback and made our decision about the direction of feature enhancement. We will continue to improve WBS Gantt-Chart for JIRA from now on, too. 

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