L13 why software fails

1Rushdi Shams, Dept of CSE, KUET, Bangladesh

Software failures take place all over the world. It happens to large companies and small ones. It happens to commercial, non-profit or even

to government organizations. Business and social impacts are wasted

taxpayers and shareholders money as well investments.

The cost compensated for software failure is now billion dollars per year.

Rushdi Shams, Dept of CSE, KUET, Bangladesh2

1 trillion dollars will be invested this year of which 5% to 15% will be abandoned before or right after the delivery of the software

Software failures are avoidable and predictable.

Most organizations do not urge to avoid failures.

The risk is even harming or destroying the whole organization.

Rushdi Shams, Dept of CSE, KUET, Bangladesh3

Average companies spend 4% to 5% of their investment on IT while financial and telecommunication companies invest about 15% on IT.

Rushdi Shams, Dept of CSE, KUET, Bangladesh4

It jeopardizes entire prospects of an organization.

IT failure in government can imperil national security.

Failure can also stunt economic growth and quality of life.

Cost of litigation faced by organizations due to the unsatisfied customers.

Rushdi Shams, Dept of CSE, KUET, Bangladesh5

Unrealistic project goals. Inaccurate estimates of required resources. Poorly defined system requirements. Poor project status reporting. Unmanaged risks.

Rushdi Shams, Dept of CSE, KUET, Bangladesh6

Poor communications among developers, users and customers.

Use of immature technology. Inability to handle project complexities. Poor project management. Stakeholder politics. Commercial pressure.

Rushdi Shams, Dept of CSE, KUET, Bangladesh7

IT projects fail because of one or two reasons- this is rare case.

It is in faction combination of technical, project management and business decisions.

Rushdi Shams, Dept of CSE, KUET, Bangladesh8

If a single mistake is seen in some place during the project run, it is required to solve that bug immediately.

Else the cost of unwrapping the works up to the glitch and solving the glitch will cost huge.

changing documents and other calculations are required then.

But it has been proved that developers spend 40% to 50% on the rework.

Rushdi Shams, Dept of CSE, KUET, Bangladesh9

Moreover, attempting a fix of an error may raise other errors.

In simple terms, IT projects fail when the rework exceeds the value added works (actual job) are budgeted for.

Rushdi Shams, Dept of CSE, KUET, Bangladesh10

A developer never wants that software will fail. So, when it fails we need to take a look at the

business environment, project management and organizational culture as well.

Rushdi Shams, Dept of CSE, KUET, Bangladesh11

Most organizations as they are in tough competition, then intend to see software projects not as investments but as costs that must be controlled.

Political exigencies can impact on the software project cost and quality as well.

Lack of upper management support can also damn IT undertakings.

Rushdi Shams, Dept of CSE, KUET, Bangladesh12

Often project managers lie about their project progress, how much they will cost and what functionalities they will provide, etc.

Once IT projects fail then we should take a look at the hardware and software used to build up the IT project and what practices were made during development.

Using unrealistic and untested technology will doom the project.

Rushdi Shams, Dept of CSE, KUET, Bangladesh13

Size of project is another key factor. It is proved that large projects fail 4-5 times

greater than small projects. The larger the project the more static

elements (software, hardware, etc) and dynamic elements (integration, testing, etc).

Rushdi Shams, Dept of CSE, KUET, Bangladesh14

15Rushdi Shams, Dept of CSE, KUET, Bangladesh

Sloppy development practice also causes software failures.

To help organizations to assess their software and hardware Capability Maturity Model (CMM) is proposed.

It rates company’s practises against 5 levels of maturity.

Rushdi Shams, Dept of CSE, KUET, Bangladesh16

CMM level 1: Using ad hoc and chaotic development process

CMM level 3: Characterized its practises and now it understands them

CMM level 5: Quantitatively understands the variations in the process and practises and it applies them as well

Rushdi Shams, Dept of CSE, KUET, Bangladesh17

Bad decisions by project managers are probably the single greatest cause of failures.

Poor technical management can lead to technical errors but it can be isolated and solved.

In contrast, poor project management is a havoc.

Rushdi Shams, Dept of CSE, KUET, Bangladesh18

An organization that values openness, honesty, communication and collaboration is more likely able to solve mistakes.

The reasons that software projects fail are well known and have been documented in many documents over the years.

By observing the current project environment and these documents one can forecast the perfection of the project.

Rushdi Shams, Dept of CSE, KUET, Bangladesh19

Why Software Fails by Robert N. Charette:This is an extraordinary article on software failures. You must have to go meticulously through the article. Don’t follow the numbers and years in the examples given in the article. You have to know the reasons and place yourself to explain and think about software failures.

Rushdi Shams, Dept of CSE, KUET, Bangladesh20