Crowdsourcing software development


Crowdsourcing software development or software crowdsourcing is an emerging area of software engineering. It is an open call for participation in any task of software development, including documentation, design, coding and testing. These tasks are normally conducted by either members of a software enterprise or people contracted by the enterprise. But in software crowdsourcing, all the tasks can be assigned to or are addressed by members of the general public. Individuals and teams may also participate in crowdsourcing contests.

Goals

Software crowdsourcing may have multiple goals.
Quality software: Crowdsourcing organizers need to define specific software quality goals and their evaluation criteria. Quality software often comes from competent contestants who can submit good solutions for rigorous evaluation.
Rapid acquisition: Instead of waiting for software to be developed, crowdsourcing organizers may post a competition hoping that something identical or similar has been developed already. This is to reduce software acquisition time.
Talent identification: A crowdsourcing organizer may be mainly interested in identifying talents as demonstrated by their performance in the competition.
Cost reduction: A crowdsourcing organizer may acquire software at a low cost by paying a small fraction of development cost as the price for award may include recognition awards.
Solution diversity: As teams will turn in different solutions for the same problem, the diversity in these solutions will be useful for fault-tolerant computing.
Ideas creation: One goal is to get new ideas from contestants and these ideas may lead to new directions.
Broadening participation: One goal is to recruit as many participants as possible to get best solution or to spread relevant knowledge.
Participant education: Organizers are interested in educating participants new knowledge. One example is nonamesite.com sponsored by DARPA to teach STEM Science, Technology, Engineering, and Mathematics.
Fund leveraging: The goal is to stimulate other organizations to sponsor similar projects to leverage funds.
Marketing: Crowdsourcing projects can be used for brand recognition among participants.

Ecosystem

Architecture support

A crowdsourcing support system needs to include 1) Software development tools: requirement tools, design tools, coding tools, compilers, debuggers, IDE, performance analysis tools, testing tools, and maintenance tools.
2) Project management tools: ranking, reputation, and award systems for products and participants.
3) Social network tools: allow participants to communicate and support each other. 4) Collaborating tools: For example, a blackboard platform where participants can see a common area and suggest ideas to improve the solutions presented in the common area.

Social networks

Social networks can provide communication, documentation, blogs, twitters, wikis, comments, feedbacks, and indexing.

Organization

Processes

Any phase of software development can be crowdsourced, and that phase can be requirements, design, coding, testing, maintenance, user experience, or any combination of these.
Existing software development processes can be modified to include crowdsourcing: 1) Waterfall model; 2) Agile processes; 3) Model-driven approach; 4) Open-Sourced approach; 5) Software-as-a-Service formal methods: formal methods can be crowdsourced.
The crowdsourcing can be competitive or non-competitive. In competitive crowdsourcing, only selected participants will win, and in highly competitive projects, many contestants will compete but few will win. In non-competitive manner, either single individuals will participate in crowdsourcing or multiple individuals can collaborate to create software. Products produced can be cross evaluated to ensure the consistency and quality of products and to identify talents, and the cross evaluation can be evaluated by crowdsourcing.
Items developed by crowdsourcing can be evaluated by crowdsourcing to determine the work produced, and evaluation of evaluation can be crowdsourced to determine the quality of evaluation.
Notable crowdsourcing processes include AppStori and Topcoder processes.
Pre-selection of participants is important for quality software crowdsourcing. In competitive crowdsourcing, a low-ranked participant should not compete against a high-ranked participant.

Platforms

Software crowdsourcing platforms including Apple Inc.'s App Store, Topcoder, and uTest demonstrate the advantage of crowdsourcing in terms of software ecosystem expansion and product quality improvement. Apple’s App Store is an online iOS application market, where developers can directly deliver their creative designs and products to smartphone customers. These developers are motivated to contribute innovative designs for both reputation and payment by the micro-payment mechanism of the App Store. Within less than four years, Apple's App Store has become a huge mobile application ecosystem with 150,000 active publishers, and generated over 700,000 IOS applications. Around the App Store, there are many community-based, collaborative platforms for the smart-phone applications incubators. For example, AppStori introduces a crowd funding approach to build an online community for developing promising ideas about new iPhone applications. IdeaScale is another platform for software crowdsourcing.
Another crowdsourcing example—Topcoder—creates a software contest model where programming tasks are posted as contests and the developer of the best solution wins the top prize. Following this model, Topcoder has established an online platform to support its ecosystem and gathered a virtual global workforce with more than 1 million registered members and nearly 50,000 active participants. All these Topcoder members compete against each other in software development tasks such as requirement analysis, algorithm design, coding, and testing.

Sample processes

The Topcoder Software Development Process consists of a number of different phases, and within each phase there can be different competition types:
  1. Architecture;
  2. Component Production;
  3. Application Assembly;
  4. Deployment
Each step can be a crowdsourcing competition.
BugFinders testing process:
  1. Engage BugFinders;
  2. Define Projects;
  3. Managed by BugFinders;
  4. Review Bugs;
  5. Get Bugs Fixed; and
  6. Release Software.

    Theoretical issues

Game theory has been used in the analysis of various software crowdsourcing projects.
Information theory can be a basis for metrics.
Economic models can provide incentives for participation in crowdsourcing efforts.

Aspects and metrics

Crowdsourcing in general is a multifaceted research topic. The use of crowdsourcing in software development is associated with a number of key tension points, or facets, which should be considered. At the same time, research can be conducted from the perspective of the three key players in crowdsourcing: the customer, the worker, and the platform.
Task decomposition:
Coordination and communication:
Planning and scheduling:
Quality assurance: A software crowdsourcing process can be described in a game process, where one party tries to minimize an objective function, yet the other party tries to maximize the same objective function as though both parties compete with each other in the game. For example, a specification team needs to produce quality specifications for the coding team to develop the code; the specification team will minimize the software bugs in the specification, while the coding team will identify as many bugs as possible in the specification before coding.
The min-max process is important as it is a quality assurance mechanism and often a team needs to perform both. For example, the coding team needs to maximize the identification of bugs in the specification, but it also needs to minimize the number of bugs in the code it produces.
Bugcrowd showed that participants will follow the prisoner's dilemma to identify bugs for security testing.
Knowledge and Intellectual Property:
'''Motivation and Remuneration:'''

Levels

There are the following levels of crowdsourcing:
Level 1: single persons, well-defined modules, small size, limited time span, quality products, current development processes such as the one by Topcoder and uTest. At this level, coders are ranked, websites contains online repository crowdsourcing materials, software can be ranked by participants, have communication tools such as wiki, blogs, comments, software development tools such as IDE, testing, compilers, simulation, modeling, and program analysis.
Level 2: teams of people, well-defined systems, medium large, medium time span, adaptive development processes with intelligent feedback in a blackboard architecture. At this level, a crowdsourcing website may support adaptive development process and even concurrent development processes with intelligent feedback with the blackboard architecture; intelligent analysis of coders, software products, and comments; multi-phase software testing and evaluation; Big Data analytics, automated wrapping software services into SaaS, annotate with ontology, cross reference to DBpedia, and Wikipedia; automated analysis and classification of software services; ontology annotation and reasoning such as linking those service with compatible input/output.
Level 3: teams of people, well-defined system, large systems, long time span, automated cross verification and cross comparison among contributions. A crowdsourcing website at this level may contain automated matching of requirements to existing components including matching of specification, services, and tests; automated regression testing.
Level 4: multinational collaboration of large and adaptive systems. A crowdsourcing website at this level may contain domain-oriented crowdsourcing with ontology, reasoning, and annotation; automated cross verification and test generation processes; automated configuration of crowdsourcing platform; and may restructure the platform as SaaS with tenant customization.